1278 lines
48 KiB
Plaintext
1278 lines
48 KiB
Plaintext
drop table if exists t1,t2,t3;
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CREATE TABLE t1 (id int,facility char(20));
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CREATE TABLE t2 (facility char(20));
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INSERT INTO t1 VALUES (NULL,NULL);
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INSERT INTO t1 VALUES (-1,'');
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INSERT INTO t1 VALUES (0,'');
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INSERT INTO t1 VALUES (1,'/L');
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INSERT INTO t1 VALUES (2,'A01');
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INSERT INTO t1 VALUES (3,'ANC');
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INSERT INTO t1 VALUES (4,'F01');
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INSERT INTO t1 VALUES (5,'FBX');
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INSERT INTO t1 VALUES (6,'MT');
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INSERT INTO t1 VALUES (7,'P');
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INSERT INTO t1 VALUES (8,'RV');
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INSERT INTO t1 VALUES (9,'SRV');
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INSERT INTO t1 VALUES (10,'VMT');
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INSERT INTO t2 SELECT DISTINCT FACILITY FROM t1;
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select id from t1 group by id;
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id
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NULL
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-1
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0
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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select * from t1 order by id;
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id facility
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NULL NULL
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-1
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0
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1 /L
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2 A01
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3 ANC
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4 F01
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5 FBX
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6 MT
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7 P
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8 RV
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9 SRV
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10 VMT
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select id-5,facility from t1 order by "id-5";
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id-5 facility
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NULL NULL
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-6
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-5
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-4 /L
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-3 A01
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-2 ANC
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-1 F01
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0 FBX
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1 MT
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2 P
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3 RV
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4 SRV
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5 VMT
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select id,concat(facility) from t1 group by id ;
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id concat(facility)
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NULL NULL
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-1
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0
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1 /L
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2 A01
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3 ANC
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4 F01
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5 FBX
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6 MT
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7 P
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8 RV
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9 SRV
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10 VMT
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select id+0 as a,max(id),concat(facility) as b from t1 group by a order by b desc,a;
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a max(id) b
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10 10 VMT
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9 9 SRV
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8 8 RV
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7 7 P
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6 6 MT
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5 5 FBX
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4 4 F01
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3 3 ANC
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2 2 A01
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1 1 /L
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-1 -1
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0 0
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NULL NULL NULL
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select id >= 0 and id <= 5 as grp,count(*) from t1 group by grp;
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grp count(*)
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NULL 1
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0 6
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1 6
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SELECT DISTINCT FACILITY FROM t1;
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FACILITY
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NULL
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/L
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A01
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ANC
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F01
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FBX
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MT
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P
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RV
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SRV
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VMT
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SELECT FACILITY FROM t2;
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FACILITY
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NULL
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/L
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A01
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ANC
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F01
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FBX
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MT
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P
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RV
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SRV
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VMT
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SELECT count(*) from t1,t2 where t1.facility=t2.facility;
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count(*)
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12
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select count(facility) from t1;
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count(facility)
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12
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select count(*) from t1;
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count(*)
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13
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select count(*) from t1 where facility IS NULL;
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count(*)
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1
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select count(*) from t1 where facility = NULL;
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count(*)
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0
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select count(*) from t1 where facility IS NOT NULL;
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count(*)
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12
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select count(*) from t1 where id IS NULL;
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count(*)
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1
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select count(*) from t1 where id IS NOT NULL;
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count(*)
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12
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drop table t1,t2;
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CREATE TABLE t1 (UserId int(11) DEFAULT '0' NOT NULL);
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t1 VALUES (20);
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INSERT INTO t1 VALUES (27);
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SELECT UserId FROM t1 WHERE Userid=22;
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UserId
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SELECT UserId FROM t1 WHERE UserId=22 group by Userid;
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UserId
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SELECT DISTINCT UserId FROM t1 WHERE UserId=22 group by Userid;
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UserId
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SELECT DISTINCT UserId FROM t1 WHERE UserId=22;
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UserId
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drop table t1;
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CREATE TABLE t1 (a int(10) unsigned not null primary key,b int(10) unsigned);
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t1 VALUES (1,1),(2,1),(3,1),(4,1);
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CREATE TABLE t2 (a int(10) unsigned not null, key (A));
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t2 VALUES (1),(2);
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CREATE TABLE t3 (a int(10) unsigned, key(A), b text);
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t3 VALUES (1,'1'),(2,'2');
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SELECT DISTINCT t3.b FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
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b
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1
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INSERT INTO t2 values (1),(2),(3);
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INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2');
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explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 NULL index a a 4 NULL 5 100.00 Using index; Using temporary
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1 SIMPLE t1 NULL eq_ref PRIMARY PRIMARY 4 test.t2.a 1 100.00 Using where
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1 SIMPLE t3 NULL ref a a 5 test.t1.b 2 100.00 Using index
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t3`.`a` AS `a` from `test`.`t3` join `test`.`t2` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`))
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SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
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a
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1
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create temporary table t4 select * from t3;
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insert into t3 select * from t4;
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insert into t4 select * from t3;
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insert into t3 select * from t4;
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insert into t4 select * from t3;
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insert into t3 select * from t4;
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insert into t4 select * from t3;
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insert into t3 select * from t4;
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ANALYZE TABLE t1,t2,t3;
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Table Op Msg_type Msg_text
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test.t1 analyze status OK
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test.t2 analyze status OK
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test.t3 analyze status OK
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explain select distinct t1.a from t1,t3 where t1.a=t3.a;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 4 100.00 Using index; Using temporary
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1 SIMPLE t3 NULL ref a a 5 test.t1.a 102 100.00 Using index; Distinct
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t3` where (`test`.`t3`.`a` = `test`.`t1`.`a`)
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flush status;
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select distinct t1.a from t1,t3 where t1.a=t3.a;
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a
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1
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2
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show status like 'Handler_read%';
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Variable_name Value
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Handler_read_first 1
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Handler_read_key 4
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Handler_read_last 0
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Handler_read_next 4
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_next 3
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flush status;
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select distinct 1 from t1,t3 where t1.a=t3.a;
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1
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1
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show status like 'Handler_read%';
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Variable_name Value
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Handler_read_first 1
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Handler_read_key 4
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Handler_read_last 0
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Handler_read_next 208
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Handler_read_prev 0
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Handler_read_rnd 0
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Handler_read_rnd_next 1
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explain SELECT distinct t1.a from t1;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 4 100.00 Using index
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a` from `test`.`t1`
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explain SELECT distinct t1.a from t1 order by a desc;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 4 100.00 Backward index scan; Using index
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a` from `test`.`t1` order by `test`.`t1`.`a` desc
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explain SELECT t1.a from t1 group by a order by a desc;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 4 100.00 Backward index scan; Using index
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` order by `test`.`t1`.`a` desc
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explain SELECT distinct t1.a from t1 order by a desc limit 1;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 1 100.00 Backward index scan; Using index
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a` from `test`.`t1` order by `test`.`t1`.`a` desc limit 1
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explain SELECT distinct a from t3 order by a desc limit 2;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t3 NULL index a a 5 NULL 204 100.00 Backward index scan; Using index
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t3`.`a` AS `a` from `test`.`t3` order by `test`.`t3`.`a` desc limit 2
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explain SELECT distinct a,b from t3 order by a+1;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 204 100.00 Using temporary; Using filesort
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t3` order by (`test`.`t3`.`a` + 1)
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explain SELECT distinct a,b from t3 order by a limit 2;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t3 NULL index NULL a 5 NULL 2 100.00 Using temporary
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t3` order by `test`.`t3`.`a` limit 2
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explain SELECT a,b from t3 group by a,b order by a+1;
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 204 100.00 Using temporary; Using filesort
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t3` group by `test`.`t3`.`a`,`test`.`t3`.`b` order by (`test`.`t3`.`a` + 1)
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SELECT distinct t1.a from t1;
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a
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1
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2
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3
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4
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SELECT distinct t1.a from t1 order by a desc;
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a
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4
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3
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2
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1
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SELECT t1.a from t1 group by a order by a desc;
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a
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4
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3
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2
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1
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SELECT distinct t1.a from t1 order by a desc limit 1;
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a
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4
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SELECT distinct a from t3 order by a desc limit 2;
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a
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2
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1
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SELECT distinct a,b from t3 order by a+1;
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a b
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1 1
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2 2
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SELECT distinct a,b from t3 order by a limit 2;
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a b
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1 1
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2 2
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SELECT a,b from t3 group by a,b order by a+1;
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a b
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1 1
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2 2
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drop table t1,t2,t3,t4;
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CREATE TABLE t1 (name varchar(255));
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INSERT INTO t1 VALUES ('aa'),('ab'),('ac'),('ad'),('ae');
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SELECT DISTINCT * FROM t1 LIMIT 2;
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name
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aa
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ab
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SELECT DISTINCT name FROM t1 LIMIT 2;
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name
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aa
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ab
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SELECT DISTINCT 1 FROM t1 LIMIT 2;
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1
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1
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drop table t1;
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CREATE TABLE t1 (
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ID int(11) NOT NULL auto_increment,
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NAME varchar(75) DEFAULT '' NOT NULL,
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LINK_ID int(11) DEFAULT '0' NOT NULL,
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PRIMARY KEY (ID),
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KEY NAME (NAME),
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KEY LINK_ID (LINK_ID)
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);
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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INSERT INTO t1 (ID, NAME, LINK_ID) VALUES (1,'Mike',0),(2,'Jack',0),(3,'Bill',0);
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CREATE TABLE t2 (
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ID int(11) NOT NULL auto_increment,
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NAME varchar(150) DEFAULT '' NOT NULL,
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PRIMARY KEY (ID),
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KEY NAME (NAME)
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);
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Warnings:
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Warning 1681 Integer display width is deprecated and will be removed in a future release.
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SELECT DISTINCT
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t2.id AS key_link_id,
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t2.name AS link
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FROM t1
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LEFT JOIN t2 ON t1.link_id=t2.id
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GROUP BY t1.id
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ORDER BY link;
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key_link_id link
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NULL NULL
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drop table t1,t2;
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create table t1 (
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id int not null,
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name tinytext not null,
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unique (id)
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);
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create table t2 (
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id int not null,
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idx int not null,
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unique (id, idx)
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);
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create table t3 (
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id int not null,
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idx int not null,
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unique (id, idx)
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);
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insert into t1 values (1,'yes'), (2,'no');
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insert into t2 values (1,1);
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insert into t3 values (1,1);
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EXPLAIN
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SELECT DISTINCT
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t1.id
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from
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t1
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straight_join
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t2
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straight_join
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t3
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straight_join
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t1 as j_lj_t2 left join t2 as t2_lj
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on j_lj_t2.id=t2_lj.id
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straight_join
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t1 as j_lj_t3 left join t3 as t3_lj
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on j_lj_t3.id=t3_lj.id
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WHERE
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((t1.id=j_lj_t2.id AND t2_lj.id IS NULL) OR (t1.id=t2.id AND t2.idx=2))
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AND ((t1.id=j_lj_t3.id AND t3_lj.id IS NULL) OR (t1.id=t3.id AND t3.idx=2));
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id select_type table partitions type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 NULL index id id 4 NULL 2 100.00 Using index; Using temporary
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1 SIMPLE t2 NULL index id id 8 NULL 1 100.00 Using index; Distinct; Using join buffer (Block Nested Loop)
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1 SIMPLE t3 NULL index id id 8 NULL 1 100.00 Using index; Distinct; Using join buffer (Block Nested Loop)
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1 SIMPLE j_lj_t2 NULL index id id 4 NULL 2 100.00 Using where; Using index; Distinct; Using join buffer (Block Nested Loop)
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1 SIMPLE t2_lj NULL index id id 8 NULL 1 100.00 Using where; Using index; Distinct; Using join buffer (Block Nested Loop)
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1 SIMPLE j_lj_t3 NULL index id id 4 NULL 2 100.00 Using where; Using index; Distinct; Using join buffer (Block Nested Loop)
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1 SIMPLE t3_lj NULL index id id 8 NULL 1 100.00 Using where; Using index; Distinct; Using join buffer (Block Nested Loop)
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Warnings:
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Note 1003 /* select#1 */ select distinct `test`.`t1`.`id` AS `id` from `test`.`t1` straight_join `test`.`t2` straight_join `test`.`t3` straight_join `test`.`t1` `j_lj_t2` left join `test`.`t2` `t2_lj` on((`test`.`t2_lj`.`id` = `test`.`j_lj_t2`.`id`)) straight_join `test`.`t1` `j_lj_t3` left join `test`.`t3` `t3_lj` on((`test`.`t3_lj`.`id` = `test`.`j_lj_t3`.`id`)) where ((((`test`.`j_lj_t2`.`id` = `test`.`t1`.`id`) and (`test`.`t2_lj`.`id` is null)) or ((`test`.`t2`.`idx` = 2) and (`test`.`t2`.`id` = `test`.`t1`.`id`))) and (((`test`.`j_lj_t3`.`id` = `test`.`t1`.`id`) and (`test`.`t3_lj`.`id` is null)) or ((`test`.`t3`.`idx` = 2) and (`test`.`t3`.`id` = `test`.`t1`.`id`))))
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SELECT DISTINCT
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t1.id
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from
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t1
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straight_join
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t2
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straight_join
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t3
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straight_join
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t1 as j_lj_t2 left join t2 as t2_lj
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on j_lj_t2.id=t2_lj.id
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straight_join
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t1 as j_lj_t3 left join t3 as t3_lj
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on j_lj_t3.id=t3_lj.id
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WHERE
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((t1.id=j_lj_t2.id AND t2_lj.id IS NULL) OR (t1.id=t2.id AND t2.idx=2))
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AND ((t1.id=j_lj_t3.id AND t3_lj.id IS NULL) OR (t1.id=t3.id AND t3.idx=2));
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id
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2
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drop table t1,t2,t3;
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create table t1 (a int not null, b int not null, t time);
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insert into t1 values (1,1,"00:06:15"),(1,2,"00:06:15"),(1,2,"00:30:15"),(1,3,"00:06:15"),(1,3,"00:30:15");
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select a,sec_to_time(sum(time_to_sec(t))) from t1 group by a,b;
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a sec_to_time(sum(time_to_sec(t)))
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1 00:06:15
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1 00:36:30
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1 00:36:30
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select distinct a,sec_to_time(sum(time_to_sec(t))) from t1 group by a,b;
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a sec_to_time(sum(time_to_sec(t)))
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1 00:06:15
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1 00:36:30
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create table t2 (a int not null primary key, b int);
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insert into t2 values (1,1),(2,2),(3,3);
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select t1.a,sec_to_time(sum(time_to_sec(t))) from t1 left join t2 on (t1.b=t2.a) group by t1.a,t2.b;
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a sec_to_time(sum(time_to_sec(t)))
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1 00:06:15
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1 00:36:30
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1 00:36:30
|
|
select distinct t1.a,sec_to_time(sum(time_to_sec(t))) from t1 left join t2 on (t1.b=t2.a) group by t1.a,t2.b;
|
|
a sec_to_time(sum(time_to_sec(t)))
|
|
1 00:06:15
|
|
1 00:36:30
|
|
drop table t1,t2;
|
|
create table t1 (a int not null,b char(5), c text);
|
|
insert into t1 (a) values (1),(2),(3),(4),(1),(2),(3),(4);
|
|
select distinct a from t1 group by b,a having a > 2 order by a desc;
|
|
a
|
|
4
|
|
3
|
|
select distinct a,c from t1 group by b,c,a having a > 2 order by a desc;
|
|
a c
|
|
4 NULL
|
|
3 NULL
|
|
drop table t1;
|
|
create table t1 (a char(1), key(a)) engine=myisam;
|
|
insert into t1 values('1'),('1');
|
|
select * from t1 where a >= '1';
|
|
a
|
|
1
|
|
1
|
|
select distinct a from t1 order by a desc;
|
|
a
|
|
1
|
|
select distinct a from t1 where a >= '1' order by a desc;
|
|
a
|
|
1
|
|
drop table t1;
|
|
CREATE TABLE t1 (email varchar(50), infoID BIGINT, dateentered DATETIME);
|
|
CREATE TABLE t2 (infoID BIGINT, shipcode varchar(10));
|
|
INSERT INTO t1 (email, infoID, dateentered) VALUES
|
|
('test1@testdomain.com', 1, '2002-07-30 22:56:38'),
|
|
('test1@testdomain.com', 1, '2002-07-27 22:58:16'),
|
|
('test2@testdomain.com', 1, '2002-06-19 15:22:19'),
|
|
('test2@testdomain.com', 2, '2002-06-18 14:23:47'),
|
|
('test3@testdomain.com', 1, '2002-05-19 22:17:32');
|
|
INSERT INTO t2(infoID, shipcode) VALUES
|
|
(1, 'Z001'),
|
|
(2, 'R002');
|
|
SELECT DISTINCTROW email, shipcode FROM t1, t2 WHERE t1.infoID=t2.infoID;
|
|
email shipcode
|
|
test1@testdomain.com Z001
|
|
test2@testdomain.com R002
|
|
test2@testdomain.com Z001
|
|
test3@testdomain.com Z001
|
|
SELECT DISTINCTROW email FROM t1 ORDER BY dateentered DESC;
|
|
email
|
|
test1@testdomain.com
|
|
test2@testdomain.com
|
|
test3@testdomain.com
|
|
SELECT DISTINCTROW email, shipcode FROM t1, t2 WHERE t1.infoID=t2.infoID ORDER BY dateentered DESC;
|
|
email shipcode
|
|
test1@testdomain.com Z001
|
|
test2@testdomain.com Z001
|
|
test2@testdomain.com R002
|
|
test3@testdomain.com Z001
|
|
drop table t1,t2;
|
|
SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
|
|
CREATE TABLE t1 (privatemessageid int(10) unsigned NOT NULL auto_increment, folderid smallint(6) NOT NULL default '0', userid int(10) unsigned NOT NULL default '0', touserid int(10) unsigned NOT NULL default '0', fromuserid int(10) unsigned NOT NULL default '0', title varchar(250) NOT NULL default '', message mediumtext NOT NULL, dateline int(10) unsigned NOT NULL default '0', showsignature smallint(6) NOT NULL default '0', iconid smallint(5) unsigned NOT NULL default '0', messageread smallint(6) NOT NULL default '0', readtime int(10) unsigned NOT NULL default '0', receipt smallint(6) unsigned NOT NULL default '0', deleteprompt smallint(6) unsigned NOT NULL default '0', multiplerecipients smallint(6) unsigned NOT NULL default '0', PRIMARY KEY (privatemessageid), KEY userid (userid)) ENGINE=MyISAM;
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t1 VALUES (128,0,33,33,8,':D','',996121863,1,0,2,996122850,2,0,0);
|
|
CREATE TABLE t2 (userid int(10) unsigned NOT NULL auto_increment, usergroupid smallint(5) unsigned NOT NULL default '0', username varchar(50) NOT NULL default '', password varchar(50) NOT NULL default '', email varchar(50) NOT NULL default '', styleid smallint(5) unsigned NOT NULL default '0', parentemail varchar(50) NOT NULL default '', coppauser smallint(6) NOT NULL default '0', homepage varchar(100) NOT NULL default '', icq varchar(20) NOT NULL default '', aim varchar(20) NOT NULL default '', yahoo varchar(20) NOT NULL default '', signature mediumtext NOT NULL, adminemail smallint(6) NOT NULL default '0', showemail smallint(6) NOT NULL default '0', invisible smallint(6) NOT NULL default '0', usertitle varchar(250) NOT NULL default '', customtitle smallint(6) NOT NULL default '0', joindate int(10) unsigned NOT NULL default '0', cookieuser smallint(6) NOT NULL default '0', daysprune smallint(6) NOT NULL default '0', lastvisit int(10) unsigned NOT NULL default '0', lastactivity int(10) unsigned NOT NULL default '0', lastpost int(10) unsigned NOT NULL default '0', posts smallint(5) unsigned NOT NULL default '0', timezoneoffset varchar(4) NOT NULL default '', emailnotification smallint(6) NOT NULL default '0', buddylist mediumtext NOT NULL, ignorelist mediumtext NOT NULL, pmfolders mediumtext NOT NULL, receivepm smallint(6) NOT NULL default '0', emailonpm smallint(6) NOT NULL default '0', pmpopup smallint(6) NOT NULL default '0', avatarid smallint(6) NOT NULL default '0', avatarrevision int(6) unsigned NOT NULL default '0', options smallint(6) NOT NULL default '15', birthday date NOT NULL default '0000-00-00', maxposts smallint(6) NOT NULL default '-1', startofweek smallint(6) NOT NULL default '1', ipaddress varchar(20) NOT NULL default '', referrerid int(10) unsigned NOT NULL default '0', nosessionhash smallint(6) NOT NULL default '0', autorefresh smallint(6) NOT NULL default '-1', messagepopup tinyint(2) NOT NULL default '0', inforum smallint(5) unsigned NOT NULL default '0', ratenum smallint(5) unsigned NOT NULL default '0', ratetotal smallint(5) unsigned NOT NULL default '0', allowrate smallint(5) unsigned NOT NULL default '1', PRIMARY KEY (userid), KEY usergroupid (usergroupid), KEY username (username), KEY inforum (inforum)) ENGINE=MyISAM;
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t2 VALUES (33,6,'Kevin','0','kevin@stileproject.com',1,'',0,'http://www.stileproject.com','','','','',1,1,0,'Administrator',0,996120694,1,-1,1030996168,1031027028,1030599436,36,'-6',0,'','','',1,0,1,0,0,15,'0000-00-00',-1,1,'64.0.0.0',0,1,-1,0,0,4,19,1);
|
|
SELECT DISTINCT t1.*, t2.* FROM t1 LEFT JOIN t2 ON (t2.userid = t1.touserid);
|
|
privatemessageid folderid userid touserid fromuserid title message dateline showsignature iconid messageread readtime receipt deleteprompt multiplerecipients userid usergroupid username password email styleid parentemail coppauser homepage icq aim yahoo signature adminemail showemail invisible usertitle customtitle joindate cookieuser daysprune lastvisit lastactivity lastpost posts timezoneoffset emailnotification buddylist ignorelist pmfolders receivepm emailonpm pmpopup avatarid avatarrevision options birthday maxposts startofweek ipaddress referrerid nosessionhash autorefresh messagepopup inforum ratenum ratetotal allowrate
|
|
128 0 33 33 8 :D 996121863 1 0 2 996122850 2 0 0 33 6 Kevin 0 kevin@stileproject.com 1 0 http://www.stileproject.com 1 1 0 Administrator 0 996120694 1 -1 1030996168 1031027028 1030599436 36 -6 0 1 0 1 0 0 15 0000-00-00 -1 1 64.0.0.0 0 1 -1 0 0 4 19 1
|
|
DROP TABLE t1,t2;
|
|
SET sql_mode = default;
|
|
CREATE TABLE t1 (a int primary key, b int, c int);
|
|
INSERT t1 VALUES (1,2,3);
|
|
CREATE TABLE t2 (a int primary key, b int, c int);
|
|
INSERT t2 VALUES (3,4,5);
|
|
SELECT DISTINCT t1.a, t2.b FROM t1, t2 WHERE t1.a=1 ORDER BY t2.c;
|
|
a b
|
|
1 4
|
|
DROP TABLE t1,t2;
|
|
CREATE table t1 ( `id` int(11) NOT NULL auto_increment, `name` varchar(50) NOT NULL default '', PRIMARY KEY (`id`)) ENGINE=MyISAM AUTO_INCREMENT=3 ;
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t1 VALUES (1, 'aaaaa');
|
|
INSERT INTO t1 VALUES (3, 'aaaaa');
|
|
INSERT INTO t1 VALUES (2, 'eeeeeee');
|
|
select distinct left(name,1) as name from t1;
|
|
name
|
|
a
|
|
e
|
|
drop table t1;
|
|
CREATE TABLE t1 (
|
|
ID int(11) NOT NULL auto_increment,
|
|
NAME varchar(75) DEFAULT '' NOT NULL,
|
|
LINK_ID int(11) DEFAULT '0' NOT NULL,
|
|
PRIMARY KEY (ID),
|
|
KEY NAME (NAME),
|
|
KEY LINK_ID (LINK_ID)
|
|
);
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t1 (ID, NAME, LINK_ID) VALUES (1,'Mike',0);
|
|
INSERT INTO t1 (ID, NAME, LINK_ID) VALUES (2,'Jack',0);
|
|
INSERT INTO t1 (ID, NAME, LINK_ID) VALUES (3,'Bill',0);
|
|
CREATE TABLE t2 (
|
|
ID int(11) NOT NULL auto_increment,
|
|
NAME varchar(150) DEFAULT '' NOT NULL,
|
|
PRIMARY KEY (ID),
|
|
KEY NAME (NAME)
|
|
);
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
SELECT DISTINCT
|
|
t2.id AS key_link_id,
|
|
t2.name AS link
|
|
FROM t1
|
|
LEFT JOIN t2 ON t1.link_id=t2.id
|
|
GROUP BY t1.id
|
|
ORDER BY link;
|
|
key_link_id link
|
|
NULL NULL
|
|
drop table t1,t2;
|
|
CREATE TABLE t1 (
|
|
html varchar(5) default NULL,
|
|
rin int(11) default '0',
|
|
rout int(11) default '0'
|
|
) ENGINE=MyISAM;
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t1 VALUES ('1',1,0);
|
|
SELECT DISTINCT html,SUM(rout)/(SUM(rin)+1) as 'prod' FROM t1 GROUP BY rin;
|
|
html prod
|
|
1 0.0000
|
|
drop table t1;
|
|
CREATE TABLE t1 (a int);
|
|
INSERT INTO t1 VALUES (1),(2),(3),(4),(5);
|
|
SELECT DISTINCT a, 1 FROM t1;
|
|
a 1
|
|
1 1
|
|
2 1
|
|
3 1
|
|
4 1
|
|
5 1
|
|
SELECT DISTINCT 1, a FROM t1;
|
|
1 a
|
|
1 1
|
|
1 2
|
|
1 3
|
|
1 4
|
|
1 5
|
|
CREATE TABLE t2 (a int, b int);
|
|
INSERT INTO t2 VALUES (1,1),(2,2),(2,3),(2,4),(3,5);
|
|
SELECT DISTINCT a, b, 2 FROM t2;
|
|
a b 2
|
|
1 1 2
|
|
2 2 2
|
|
2 3 2
|
|
2 4 2
|
|
3 5 2
|
|
SELECT DISTINCT 2, a, b FROM t2;
|
|
2 a b
|
|
2 1 1
|
|
2 2 2
|
|
2 2 3
|
|
2 2 4
|
|
2 3 5
|
|
SELECT DISTINCT a, 2, b FROM t2;
|
|
a 2 b
|
|
1 2 1
|
|
2 2 2
|
|
2 2 3
|
|
2 2 4
|
|
3 2 5
|
|
DROP TABLE t1,t2;
|
|
CREATE TABLE t1(a INT PRIMARY KEY, b INT);
|
|
INSERT INTO t1 VALUES (1,1), (2,1), (3,1);
|
|
EXPLAIN SELECT DISTINCT a FROM t1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 3 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a` from `test`.`t1`
|
|
EXPLAIN SELECT DISTINCT a,b FROM t1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`
|
|
EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1_1 NULL ALL NULL NULL NULL NULL 3 100.00 Using temporary
|
|
1 SIMPLE t1_2 NULL index NULL PRIMARY 4 NULL 3 100.00 Using index; Distinct; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t1_1`.`a` AS `a`,`test`.`t1_1`.`b` AS `b` from `test`.`t1` `t1_1` join `test`.`t1` `t1_2`
|
|
EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2
|
|
WHERE t1_1.a = t1_2.a;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1_1 NULL ALL PRIMARY NULL NULL NULL 3 100.00 Using temporary
|
|
1 SIMPLE t1_2 NULL eq_ref PRIMARY PRIMARY 4 test.t1_1.a 1 100.00 Using index; Distinct
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t1_1`.`a` AS `a`,`test`.`t1_1`.`b` AS `b` from `test`.`t1` `t1_1` join `test`.`t1` `t1_2` where (`test`.`t1_2`.`a` = `test`.`t1_1`.`a`)
|
|
EXPLAIN SELECT a FROM t1 GROUP BY a;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 3 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a`
|
|
EXPLAIN SELECT a,b FROM t1 GROUP BY a,b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` group by `test`.`t1`.`a`,`test`.`t1`.`b`
|
|
EXPLAIN SELECT DISTINCT a,b FROM t1 GROUP BY a,b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` group by `test`.`t1`.`a`,`test`.`t1`.`b`
|
|
CREATE TABLE t2(a INT, b INT NOT NULL, c INT NOT NULL, d INT,
|
|
PRIMARY KEY (a,b));
|
|
INSERT INTO t2 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
|
|
EXPLAIN SELECT DISTINCT a FROM t2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL index PRIMARY PRIMARY 8 NULL 3 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a` AS `a` from `test`.`t2`
|
|
EXPLAIN SELECT DISTINCT a,a FROM t2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL index PRIMARY PRIMARY 8 NULL 3 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`a` AS `a` from `test`.`t2`
|
|
EXPLAIN SELECT DISTINCT b,a FROM t2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL index PRIMARY PRIMARY 8 NULL 3 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t2`.`b` AS `b`,`test`.`t2`.`a` AS `a` from `test`.`t2`
|
|
EXPLAIN SELECT DISTINCT a,c FROM t2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 Using temporary
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`c` AS `c` from `test`.`t2`
|
|
EXPLAIN SELECT DISTINCT c,a,b FROM t2;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t2`.`c` AS `c`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2`
|
|
EXPLAIN SELECT DISTINCT a,b,d FROM t2 GROUP BY c,b,d;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 Using temporary
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`d` AS `d` from `test`.`t2` group by `test`.`t2`.`c`,`test`.`t2`.`b`,`test`.`t2`.`d`
|
|
CREATE UNIQUE INDEX c_b_unq ON t2 (c,b);
|
|
EXPLAIN SELECT DISTINCT a,b,d FROM t2 GROUP BY c,b,d;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`d` AS `d` from `test`.`t2` group by `test`.`t2`.`c`,`test`.`t2`.`b`,`test`.`t2`.`d`
|
|
DROP TABLE t1,t2;
|
|
create table t1 (id int, dsc varchar(50));
|
|
insert into t1 values (1, "line number one"), (2, "line number two"), (3, "line number three");
|
|
select distinct id, IFNULL(dsc, '-') from t1;
|
|
id IFNULL(dsc, '-')
|
|
1 line number one
|
|
2 line number two
|
|
3 line number three
|
|
drop table t1;
|
|
CREATE TABLE t1 (a int primary key, b int);
|
|
INSERT INTO t1 (a,b) values (1,1), (2,3), (3,2);
|
|
explain SELECT DISTINCT a, b FROM t1 ORDER BY b;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 Using filesort
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` order by `test`.`t1`.`b`
|
|
SELECT DISTINCT a, b FROM t1 ORDER BY b;
|
|
a b
|
|
1 1
|
|
3 2
|
|
2 3
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (
|
|
ID int(11) NOT NULL auto_increment,
|
|
x varchar(20) default NULL,
|
|
y decimal(10,0) default NULL,
|
|
PRIMARY KEY (ID),
|
|
KEY (y)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t1 VALUES
|
|
(1,'ba','-1'),
|
|
(2,'ba','1150'),
|
|
(306,'ba','-1'),
|
|
(307,'ba','1150'),
|
|
(611,'ba','-1'),
|
|
(612,'ba','1150');
|
|
select count(distinct x,y) from t1;
|
|
count(distinct x,y)
|
|
2
|
|
select count(distinct concat(x,y)) from t1;
|
|
count(distinct concat(x,y))
|
|
2
|
|
drop table t1;
|
|
CREATE TABLE t1 (a INT, b INT, PRIMARY KEY (a,b));
|
|
INSERT INTO t1 VALUES (1, 101);
|
|
INSERT INTO t1 SELECT a + 1, a + 101 FROM t1;
|
|
INSERT INTO t1 SELECT a + 2, a + 102 FROM t1;
|
|
INSERT INTO t1 SELECT a + 4, a + 104 FROM t1;
|
|
INSERT INTO t1 SELECT a + 8, a + 108 FROM t1;
|
|
EXPLAIN SELECT DISTINCT a,a FROM t1 WHERE b < 12 ORDER BY a;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index PRIMARY PRIMARY 8 NULL 16 33.33 Using where; Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a`,`test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`b` < 12) order by `test`.`t1`.`a`
|
|
SELECT DISTINCT a,a FROM t1 WHERE b < 12 ORDER BY a;
|
|
a a
|
|
DROP TABLE t1;
|
|
DROP TABLE IF EXISTS t1;
|
|
CREATE TABLE t1 (id INT NOT NULL, fruit_id INT NOT NULL, fruit_name varchar(20)
|
|
default NULL);
|
|
INSERT INTO t1 VALUES (1,1,'ORANGE');
|
|
INSERT INTO t1 VALUES (2,2,'APPLE');
|
|
INSERT INTO t1 VALUES (3,2,'APPLE');
|
|
INSERT INTO t1 VALUES (4,3,'PEAR');
|
|
SELECT DISTINCT fruit_id, fruit_name INTO @v1, @v2 FROM t1 WHERE fruit_name =
|
|
'APPLE';
|
|
SELECT @v1, @v2;
|
|
@v1 @v2
|
|
2 APPLE
|
|
SELECT DISTINCT fruit_id, fruit_name INTO @v3, @v4 FROM t1 GROUP BY fruit_id,
|
|
fruit_name HAVING fruit_name = 'APPLE';
|
|
SELECT @v3, @v4;
|
|
@v3 @v4
|
|
2 APPLE
|
|
SELECT DISTINCT @v5:= fruit_id, @v6:= fruit_name INTO @v7, @v8 FROM t1 WHERE
|
|
fruit_name = 'APPLE';
|
|
Warnings:
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
SELECT @v5, @v6, @v7, @v8;
|
|
@v5 @v6 @v7 @v8
|
|
2 APPLE 2 APPLE
|
|
SELECT DISTINCT @v5 + fruit_id, CONCAT(@v6, fruit_name) INTO @v9, @v10 FROM t1
|
|
WHERE fruit_name = 'APPLE';
|
|
SELECT @v5, @v6, @v7, @v8, @v9, @v10;
|
|
@v5 @v6 @v7 @v8 @v9 @v10
|
|
2 APPLE 2 APPLE 4 APPLEAPPLE
|
|
SELECT DISTINCT @v11:= @v5 + fruit_id, @v12:= CONCAT(@v6, fruit_name) INTO
|
|
@v13, @v14 FROM t1 WHERE fruit_name = 'APPLE';
|
|
Warnings:
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
SELECT @v11, @v12, @v13, @v14;
|
|
@v11 @v12 @v13 @v14
|
|
4 APPLEAPPLE 4 APPLEAPPLE
|
|
SELECT DISTINCT @v13, @v14 INTO @v15, @v16 FROM t1 WHERE fruit_name = 'APPLE';
|
|
SELECT @v15, @v16;
|
|
@v15 @v16
|
|
4 APPLEAPPLE
|
|
SELECT DISTINCT 2 + 2, 'Bob' INTO @v17, @v18 FROM t1 WHERE fruit_name =
|
|
'APPLE';
|
|
SELECT @v17, @v18;
|
|
@v17 @v18
|
|
4 Bob
|
|
DROP TABLE IF EXISTS t2;
|
|
CREATE TABLE t2 (fruit_id INT NOT NULL, fruit_name varchar(20)
|
|
default NULL);
|
|
SELECT DISTINCT fruit_id, fruit_name INTO OUTFILE
|
|
'../../tmp/data1.tmp' FROM t1 WHERE fruit_name = 'APPLE';
|
|
LOAD DATA INFILE '../../tmp/data1.tmp' INTO TABLE t2;
|
|
SELECT DISTINCT @v19:= fruit_id, @v20:= fruit_name INTO OUTFILE
|
|
'../../tmp/data2.tmp' FROM t1 WHERE fruit_name = 'APPLE';
|
|
Warnings:
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
LOAD DATA INFILE '../../tmp/data2.tmp' INTO TABLE t2;
|
|
SELECT @v19, @v20;
|
|
@v19 @v20
|
|
2 APPLE
|
|
SELECT * FROM t2;
|
|
fruit_id fruit_name
|
|
2 APPLE
|
|
2 APPLE
|
|
DROP TABLE t1;
|
|
DROP TABLE t2;
|
|
CREATE TABLE t1 (a CHAR(1));
|
|
INSERT INTO t1 VALUES('A'), (0);
|
|
SELECT a FROM t1 WHERE a=0;
|
|
a
|
|
A
|
|
0
|
|
Warnings:
|
|
Warning 1292 Truncated incorrect DOUBLE value: 'A'
|
|
SELECT DISTINCT a FROM t1 WHERE a=0;
|
|
a
|
|
A
|
|
0
|
|
Warnings:
|
|
Warning 1292 Truncated incorrect DOUBLE value: 'A'
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a DATE);
|
|
INSERT INTO t1 VALUES ('1972-07-29'), ('1972-02-06');
|
|
EXPLAIN SELECT (SELECT DISTINCT a FROM t1 WHERE a = '2002-08-03');
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
2 SUBQUERY t1 NULL ALL NULL NULL NULL NULL 2 50.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select (/* select#2 */ select distinct `test`.`t1`.`a` from `test`.`t1` where (`test`.`t1`.`a` = DATE'2002-08-03')) AS `(SELECT DISTINCT a FROM t1 WHERE a = '2002-08-03')`
|
|
EXPLAIN SELECT (SELECT DISTINCT ADDDATE(a,1) FROM t1
|
|
WHERE ADDDATE(a,1) = '2002-08-03');
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
2 SUBQUERY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select (/* select#2 */ select distinct (`test`.`t1`.`a` + interval 1 day) from `test`.`t1` where ((`test`.`t1`.`a` + interval 1 day) = '2002-08-03')) AS `(SELECT DISTINCT ADDDATE(a,1) FROM t1
|
|
WHERE ADDDATE(a,1) = '2002-08-03')`
|
|
CREATE TABLE t2 (a CHAR(5) CHARACTER SET latin1 COLLATE latin1_general_ci);
|
|
INSERT INTO t2 VALUES (0xf6);
|
|
INSERT INTO t2 VALUES ('oe');
|
|
SELECT COUNT(*) FROM (SELECT DISTINCT a FROM t2) dt;
|
|
COUNT(*)
|
|
2
|
|
set names latin1;
|
|
SELECT COUNT(*) FROM
|
|
(SELECT DISTINCT a FROM t2 WHERE a='oe' COLLATE latin1_german2_ci) dt;
|
|
COUNT(*)
|
|
2
|
|
set names utf8mb4;
|
|
DROP TABLE t1, t2;
|
|
CREATE TABLE t1 (a INT, UNIQUE (a));
|
|
INSERT INTO t1 VALUES (4),(null),(2),(1),(null),(3);
|
|
EXPLAIN SELECT DISTINCT a FROM t1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index a a 5 NULL 6 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a` from `test`.`t1`
|
|
SELECT DISTINCT a FROM t1;
|
|
a
|
|
NULL
|
|
1
|
|
2
|
|
3
|
|
4
|
|
EXPLAIN SELECT a FROM t1 GROUP BY a;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index a a 5 NULL 6 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a`
|
|
SELECT a FROM t1 GROUP BY a;
|
|
a
|
|
NULL
|
|
1
|
|
2
|
|
3
|
|
4
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a INT, b INT);
|
|
INSERT INTO t1 VALUES(1,1),(1,2),(1,3);
|
|
SELECT DISTINCT a, b FROM t1;
|
|
a b
|
|
1 1
|
|
1 2
|
|
1 3
|
|
SELECT DISTINCT a, a, b FROM t1;
|
|
a a b
|
|
1 1 1
|
|
1 1 2
|
|
1 1 3
|
|
DROP TABLE t1;
|
|
End of 5.0 tests
|
|
CREATE TABLE t1(a INT, b INT, c INT, d INT, e INT,
|
|
PRIMARY KEY(a,b,c,d,e),
|
|
KEY(a,b,d,c)
|
|
);
|
|
INSERT IGNORE INTO t1(a, b, c) VALUES (1, 1, 1),
|
|
(1, 1, 2),
|
|
(1, 1, 3),
|
|
(1, 2, 1),
|
|
(1, 2, 2),
|
|
(1, 2, 3);
|
|
Warnings:
|
|
Warning 1364 Field 'd' doesn't have a default value
|
|
Warning 1364 Field 'e' doesn't have a default value
|
|
EXPLAIN SELECT DISTINCT a, b, d, c FROM t1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 NULL index PRIMARY,a a 16 NULL 6 100.00 Using index
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`d` AS `d`,`test`.`t1`.`c` AS `c` from `test`.`t1`
|
|
SELECT DISTINCT a, b, d, c FROM t1;
|
|
a b d c
|
|
1 1 0 1
|
|
1 1 0 2
|
|
1 1 0 3
|
|
1 2 0 1
|
|
1 2 0 2
|
|
1 2 0 3
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug #46159: simple query that never returns
|
|
#
|
|
SET @old_max_heap_table_size = @@max_heap_table_size;
|
|
SET @@max_heap_table_size = 16384;
|
|
SET @old_sort_buffer_size = @@sort_buffer_size;
|
|
SET @@sort_buffer_size = 32804;
|
|
CREATE TABLE t1(c1 int, c2 VARCHAR(20));
|
|
INSERT INTO t1 VALUES (1, '1'), (1, '1'), (2, '2'), (3, '1'), (3, '1'), (4, '4');
|
|
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
|
|
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
|
|
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
|
|
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
|
|
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
|
|
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
|
|
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
|
|
INSERT INTO t1 SELECT 5 + 10000 * RAND(), '5' FROM t1;
|
|
SELECT c1, c2, COUNT(*) FROM t1 GROUP BY c1 LIMIT 4;
|
|
c1 c2 COUNT(*)
|
|
1 1 2
|
|
2 2 1
|
|
3 1 2
|
|
4 4 1
|
|
EXPLAIN FORMAT=tree SELECT DISTINCT c2 FROM t1 GROUP BY c1 HAVING COUNT(*) > 1;
|
|
EXPLAIN
|
|
-> Sort with duplicate removal: <temporary>.c2
|
|
-> Filter: (count(0) > 1)
|
|
-> Table scan on <temporary>
|
|
-> Aggregate using temporary table
|
|
-> Table scan on t1 (cost=155.98 rows=1536)
|
|
|
|
SELECT DISTINCT c2 FROM t1 GROUP BY c1 HAVING COUNT(*) > 1;
|
|
c2
|
|
1
|
|
5
|
|
DROP TABLE t1;
|
|
SET @@sort_buffer_size = @old_sort_buffer_size;
|
|
SET @@max_heap_table_size = @old_max_heap_table_size;
|
|
End of 5.1 tests
|
|
#
|
|
# Bug #11744875: 4082: integer lengths cause truncation with distinct concat and innodb
|
|
#
|
|
CREATE TABLE t1 (a INT(1), b INT(1));
|
|
Warnings:
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
Warning 1681 Integer display width is deprecated and will be removed in a future release.
|
|
INSERT INTO t1 VALUES (1111, 2222), (3333, 4444);
|
|
SELECT DISTINCT CONCAT(a,b) AS c FROM t1 ORDER BY 1;
|
|
c
|
|
11112222
|
|
33334444
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug#16539979 BASIC SELECT COUNT(DISTINCT ID) IS BROKEN.
|
|
# Bug#17867117 ERROR RESULT WHEN "COUNT + DISTINCT + CASE WHEN" NEED MERGE_WALK
|
|
#
|
|
SET @tmp_table_size_save= @@tmp_table_size;
|
|
SET @@tmp_table_size= 1024;
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (1),(2),(3),(4),(5),(6),(7),(8);
|
|
INSERT INTO t1 SELECT a+8 FROM t1;
|
|
INSERT INTO t1 SELECT a+16 FROM t1;
|
|
INSERT INTO t1 SELECT a+32 FROM t1;
|
|
INSERT INTO t1 SELECT a+64 FROM t1;
|
|
INSERT INTO t1 VALUE(NULL);
|
|
SELECT COUNT(DISTINCT a) FROM t1;
|
|
COUNT(DISTINCT a)
|
|
128
|
|
SELECT COUNT(DISTINCT (a+0)) FROM t1;
|
|
COUNT(DISTINCT (a+0))
|
|
128
|
|
DROP TABLE t1;
|
|
create table tb(
|
|
id int auto_increment primary key,
|
|
v varchar(32))
|
|
engine=myisam charset=gbk;
|
|
insert into tb(v) values("aaa");
|
|
insert into tb(v) (select v from tb);
|
|
insert into tb(v) (select v from tb);
|
|
insert into tb(v) (select v from tb);
|
|
insert into tb(v) (select v from tb);
|
|
insert into tb(v) (select v from tb);
|
|
insert into tb(v) (select v from tb);
|
|
update tb set v=concat(v, id);
|
|
select count(distinct case when id<=64 then id end) from tb;
|
|
count(distinct case when id<=64 then id end)
|
|
64
|
|
select count(distinct case when id<=63 then id end) from tb;
|
|
count(distinct case when id<=63 then id end)
|
|
63
|
|
drop table tb;
|
|
SET @@tmp_table_size= @tmp_table_size_save;
|
|
End of 5.5 tests
|
|
#
|
|
# BUG#13540692: WRONG NULL HANDLING WITH RIGHT JOIN +
|
|
# DISTINCT OR ORDER BY
|
|
#
|
|
CREATE TABLE t1 (
|
|
a INT,
|
|
b INT NOT NULL
|
|
);
|
|
INSERT INTO t1 VALUES (1,2), (3,3);
|
|
SET @save_optimizer_switch= @@optimizer_switch;
|
|
SET @@SESSION.optimizer_switch="derived_merge=off";
|
|
|
|
EXPLAIN SELECT DISTINCT subselect.b
|
|
FROM t1 LEFT JOIN
|
|
(SELECT it_b.* FROM t1 as it_a LEFT JOIN t1 as it_b ON true) AS subselect
|
|
ON t1.a = subselect.b
|
|
;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary
|
|
1 PRIMARY <derived2> NULL ref <auto_key0> <auto_key0> 5 test.t1.a 2 100.00 NULL
|
|
2 DERIVED it_a NULL ALL NULL NULL NULL NULL 2 100.00 NULL
|
|
2 DERIVED it_b NULL ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop)
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct `subselect`.`b` AS `b` from `test`.`t1` left join (/* select#2 */ select `test`.`it_b`.`a` AS `a`,`test`.`it_b`.`b` AS `b` from `test`.`t1` `it_a` left join `test`.`t1` `it_b` on(true) where true) `subselect` on((`subselect`.`b` = `test`.`t1`.`a`)) where true
|
|
SELECT DISTINCT subselect.b
|
|
FROM t1 LEFT JOIN
|
|
(SELECT it_b.* FROM t1 as it_a LEFT JOIN t1 as it_b ON true) AS subselect
|
|
ON t1.a = subselect.b
|
|
;
|
|
b
|
|
NULL
|
|
3
|
|
SET @@SESSION.optimizer_switch= @save_optimizer_switch;
|
|
DROP TABLE t1;
|
|
#
|
|
# BUG#13538387: WRONG RESULT ON SELECT DISTINCT + LEFT JOIN +
|
|
# LIMIT + MIX OF MYISAM AND INNODB
|
|
#
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (2),(3);
|
|
CREATE TABLE t2 (b INT);
|
|
CREATE TABLE t3 (
|
|
a INT,
|
|
b INT,
|
|
PRIMARY KEY (b)
|
|
);
|
|
INSERT INTO t3 VALUES (2001,1), (2007,2);
|
|
EXPLAIN SELECT DISTINCT t3.a AS t3_date
|
|
FROM t1
|
|
LEFT JOIN t2 ON false
|
|
LEFT JOIN t3 ON t2.b = t3.b
|
|
LIMIT 1;
|
|
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t2 NULL system NULL NULL NULL NULL 0 0.00 const row not found
|
|
1 SIMPLE t3 NULL const PRIMARY NULL NULL NULL 1 100.00 Impossible ON condition
|
|
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select distinct NULL AS `t3_date` from `test`.`t1` left join `test`.`t3` on(multiple equal(NULL, NULL)) where true limit 1
|
|
SELECT DISTINCT t3.a AS t3_date
|
|
FROM t1
|
|
LEFT JOIN t2 ON false
|
|
LEFT JOIN t3 ON t2.b = t3.b
|
|
LIMIT 1;
|
|
t3_date
|
|
NULL
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# Bug#22686994 REGRESSION FOR A GROUPING QUERY WITH DISTINCT
|
|
#
|
|
CREATE TABLE t1 (a INTEGER, b INTEGER);
|
|
INSERT INTO t1 VALUES (1,3), (2,4), (1,5),
|
|
(1,3), (2,1), (1,5), (1,7), (3,1),
|
|
(3,2), (3,1), (2,4);
|
|
SELECT DISTINCT (COUNT(DISTINCT b) + 1) AS c FROM t1 GROUP BY a;
|
|
c
|
|
4
|
|
3
|
|
DROP TABLE t1;
|
|
# End of test for Bug#22686994
|
|
#
|
|
# Bug #25740550: DISTINCT OPERATIONS ON TEMP TABLES ALLOCATE TOO LITTLE
|
|
# MEMORY FOR SORT KEYS
|
|
#
|
|
# A test for remove_dup_with_hash_index() where sort keys are significantly
|
|
# longer than the row itself.
|
|
#
|
|
CREATE TABLE t1(c1 int, c2 VARCHAR(1) COLLATE utf8mb4_0900_as_cs);
|
|
INSERT INTO t1 VALUES (1, 'a');
|
|
INSERT INTO t1 VALUES (2, 'A');
|
|
SELECT DISTINCT c2 FROM t1 GROUP BY c1;
|
|
c2
|
|
a
|
|
A
|
|
DROP TABLE t1;
|
|
#
|
|
# Bug#20692219 INCORRECT RESULT FOR DISTINCT SELECT
|
|
#
|
|
CREATE TABLE t(a INT, b INT);
|
|
INSERT INTO t VALUES(1,2);
|
|
INSERT INTO t VALUES(2,4);
|
|
SELECT LEAST(1,COUNT(DISTINCT a)) FROM t GROUP BY a;
|
|
LEAST(1,COUNT(DISTINCT a))
|
|
1
|
|
1
|
|
SELECT DISTINCT LEAST(1,COUNT(DISTINCT a)) FROM t GROUP BY a;
|
|
LEAST(1,COUNT(DISTINCT a))
|
|
1
|
|
DROP TABLE t;
|
|
#
|
|
# Bug #28974762: WL#12074: RESULT DIFFS WITH SOME SELECT DISTINCT QUERIES
|
|
#
|
|
SET @old_optimizer_switch=@@optimizer_switch;
|
|
SET optimizer_switch='block_nested_loop=off';
|
|
CREATE TABLE t1 (
|
|
pk integer NOT NULL,
|
|
f1 integer,
|
|
f2 varchar(10),
|
|
f3 varchar(255)
|
|
);
|
|
INSERT INTO t1 VALUES (14,7,'G','W');
|
|
INSERT INTO t1 VALUES (16,8,'W','p');
|
|
INSERT INTO t1 VALUES (23,NULL,'q','w');
|
|
SELECT DISTINCT table1.pk FROM t1 AS table1 LEFT JOIN t1 AS table2 ON table1.f2=table2.f3 WHERE table2.f1 IS NULL;
|
|
pk
|
|
14
|
|
16
|
|
23
|
|
EXPLAIN FORMAT=tree SELECT DISTINCT table1.pk FROM t1 AS table1 LEFT JOIN t1 AS table2 ON table1.f2=table2.f3 WHERE table2.f1 IS NULL;
|
|
EXPLAIN
|
|
-> Table scan on <temporary>
|
|
-> Temporary table with deduplication
|
|
-> Filter: (table2.f1 is null) (cost=3.81 rows=3)
|
|
-> Nested loop left join (cost=3.81 rows=3)
|
|
-> Table scan on table1 (cost=0.80 rows=3)
|
|
-> Filter: (table1.f2 = table2.f3) (cost=0.74 rows=1)
|
|
-> Table scan on table2 (cost=0.74 rows=3)
|
|
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (
|
|
pk integer
|
|
);
|
|
INSERT INTO t1 VALUES (3);
|
|
CREATE TABLE t2 (
|
|
pk integer,
|
|
f1 integer
|
|
);
|
|
INSERT INTO t2 VALUES (12,4);
|
|
CREATE TABLE t3 (
|
|
pk integer,
|
|
f2 integer,
|
|
f3 integer
|
|
);
|
|
INSERT INTO t3 VALUES (56,0,4);
|
|
INSERT INTO t3 VALUES (97,3,4);
|
|
SELECT /*+JOIN_ORDER(t2,t3,t1) */ DISTINCT t2.pk FROM t1 LEFT JOIN t2 RIGHT OUTER JOIN t3 ON t2.f1 = t3.f3 ON t1.pk = t3.f2 WHERE t3.pk <> t2.pk;
|
|
pk
|
|
12
|
|
EXPLAIN FORMAT=tree SELECT /*+JOIN_ORDER(t2,t3,t1) */ DISTINCT t2.pk FROM t1 LEFT JOIN t2 RIGHT OUTER JOIN t3 ON t2.f1 = t3.f3 ON t1.pk = t3.f2 WHERE t3.pk <> t2.pk;
|
|
EXPLAIN
|
|
-> Limit: 1 row(s)
|
|
-> Table scan on <temporary>
|
|
-> Temporary table
|
|
-> Filter: ((t3.f2 = '3') and (t3.f3 = '4') and (t3.pk <> '12')) (cost=0.70 rows=1)
|
|
-> Table scan on t3 (cost=0.70 rows=2)
|
|
|
|
DROP TABLE t1, t2, t3;
|
|
SET optimizer_switch=@old_optimizer_switch;
|
|
#
|
|
# Test that DISTINCT-by-filesort manages to deduplicate across sort chunks.
|
|
#
|
|
SET @old_sort_buffer_size = @@sort_buffer_size;
|
|
SET @@sort_buffer_size = 32768;
|
|
CREATE TABLE t1 ( f FLOAT );
|
|
INSERT INTO t1 VALUES (0.0);
|
|
INSERT INTO t1 SELECT RAND() FROM t1 AS t1, t1 AS t2;
|
|
INSERT INTO t1 SELECT RAND() FROM t1 AS t1, t1 AS t2;
|
|
INSERT INTO t1 SELECT RAND() FROM t1 AS t1, t1 AS t2;
|
|
INSERT INTO t1 SELECT RAND() FROM t1 AS t1, t1 AS t2;
|
|
INSERT INTO t1 SELECT RAND() FROM t1;
|
|
INSERT INTO t1 SELECT RAND() FROM t1;
|
|
EXPLAIN FORMAT=tree SELECT DISTINCT COUNT(*) AS num FROM t1 GROUP BY f HAVING num=1;
|
|
EXPLAIN
|
|
-> Sort with duplicate removal: <temporary>.num
|
|
-> Filter: (num = 1)
|
|
-> Table scan on <temporary>
|
|
-> Aggregate using temporary table
|
|
-> Table scan on t1 (cost=725.99 rows=7224)
|
|
|
|
SELECT DISTINCT COUNT(*) AS num FROM t1 GROUP BY f HAVING num=1;
|
|
num
|
|
1
|
|
DROP TABLE t1;
|
|
SET @@sort_buffer_size = @old_sort_buffer_size;
|
|
#
|
|
# Bug #29486219: RECENT REGRESSION: CRASH IN FILESORT::MAKE_SORTORDER()
|
|
#
|
|
CREATE TABLE t1 (
|
|
a INTEGER NOT NULL,
|
|
b BIT(62) NOT NULL
|
|
);
|
|
SELECT DISTINCT b FROM t1 GROUP BY a, b;
|
|
b
|
|
DROP TABLE t1;
|