58 lines
1.1 KiB
Plaintext
58 lines
1.1 KiB
Plaintext
DROP TABLE IF EXISTS t1,t2;
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CREATE TABLE t1 (a INT, b CHAR(8), pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=xengine;
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INSERT INTO t1 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e'),(10000,'foobar');
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INSERT INTO t1 (a,b) SELECT a, b FROM t1;
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CREATE TABLE t2 (c CHAR(8), d INT, pk INT AUTO_INCREMENT PRIMARY KEY) ENGINE=xengine;
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INSERT INTO t2 (c,d) SELECT b, a FROM t1;
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UPDATE IGNORE t1 SET b = 'upd1' WHERE b IS NOT NULL ORDER BY a LIMIT 1;
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SELECT a,b FROM t1 ORDER BY pk;
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a b
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1 upd1
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2 b
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3 c
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4 d
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5 e
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10000 foobar
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1 a
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2 b
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3 c
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4 d
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5 e
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10000 foobar
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UPDATE t1, t2 SET b = 'upd2a', c = 'upd2b'
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WHERE c < b OR a != ( SELECT 1 UNION SELECT 2 );
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ERROR 21000: Subquery returns more than 1 row
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UPDATE IGNORE t1, t2 SET b = 'upd2a', c = 'upd2b'
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WHERE c < b OR a != ( SELECT 1 UNION SELECT 2 );
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Warnings:
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Warning 1242 Subquery returns more than 1 row
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SELECT a,b FROM t1 ORDER BY pk;
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a b
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1 upd2a
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2 upd2a
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3 upd2a
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4 upd2a
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5 upd2a
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10000 upd2a
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1 a
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2 upd2a
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3 upd2a
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4 upd2a
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5 upd2a
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10000 upd2a
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SELECT c,d FROM t2 ORDER BY pk;
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c d
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upd2b 1
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upd2b 2
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upd2b 3
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upd2b 4
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upd2b 5
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upd2b 10000
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upd2b 1
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upd2b 2
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upd2b 3
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upd2b 4
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upd2b 5
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upd2b 10000
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DROP TABLE t1, t2;
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