39 lines
918 B
Plaintext
39 lines
918 B
Plaintext
DROP TABLE IF EXISTS t1;
|
|
CREATE TABLE t1 (a INT, b CHAR(8), pk INT AUTO_INCREMENT PRIMARY KEY, KEY(b)) ENGINE=xengine;
|
|
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(6,'x'),(7,'y'),(8,'z');
|
|
DELETE FROM t1 WHERE b > 'y';
|
|
DELETE FROM t1 WHERE a=2;
|
|
SELECT a,b FROM t1;
|
|
a b
|
|
1 a
|
|
3 c
|
|
4 d
|
|
5 e
|
|
6 x
|
|
7 y
|
|
DELETE FROM t1;
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a INT PRIMARY KEY, b CHAR(8)) ENGINE=xengine;
|
|
INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(6,'x'),(7,'y'),(8,'z');
|
|
DELETE FROM t1 WHERE b > 'y';
|
|
DELETE FROM t1 WHERE a=2;
|
|
SELECT a,b FROM t1;
|
|
a b
|
|
1 a
|
|
3 c
|
|
4 d
|
|
5 e
|
|
6 x
|
|
7 y
|
|
DELETE FROM t1;
|
|
DROP TABLE t1;
|
|
CREATE TABLE t1 (a INT, b INT, c INT, pk INT AUTO_INCREMENT PRIMARY KEY, KEY(a), KEY (b)) ENGINE=xengine;
|
|
INSERT INTO t1 (a,b,c) VALUES (1,2,3),(4,5,6),(7,8,9);
|
|
DELETE FROM t1 WHERE a = 10 OR b = 20 ORDER BY c LIMIT 1;
|
|
SELECT a,b,c FROM t1;
|
|
a b c
|
|
1 2 3
|
|
4 5 6
|
|
7 8 9
|
|
DROP TABLE t1;
|