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DROP TABLE IF EXISTS t1,t2;
CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t1 (a,b) VALUES (10000,'foobar'),(1,'a'),(2,'b'),(3,'c'),(4,'d'),(5,'e');
INSERT INTO t1 (a,b) SELECT a, b FROM t1;
CREATE TABLE t2 (c <CHAR_COLUMN>, d <INT_COLUMN>) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>;
INSERT INTO t2 (c,d) SELECT b, a FROM t1;
SELECT a,b FROM t1;
a b
1 a
1 a
10000 foobar
10000 foobar
2 b
2 b
3 c
3 c
4 d
4 d
5 e
5 e
SELECT c,d FROM t2;
c d
a 1
a 1
b 2
b 2
c 3
c 3
d 4
d 4
e 5
e 5
foobar 10000
foobar 10000
DELETE IGNORE FROM t1 WHERE b IS NOT NULL ORDER BY a LIMIT 1;
SELECT a,b FROM t1;
a b
1 a
10000 foobar
10000 foobar
2 b
2 b
3 c
3 c
4 d
4 d
5 e
5 e
DELETE IGNORE t1.*, t2.* FROM t1, t2 WHERE c < b OR a != ( SELECT 1 UNION SELECT 2 );
Warnings:
Warning 1242 Subquery returns more than 1 row
SELECT a,b FROM t1;
a b
1 a
SELECT c,d FROM t2;
c d
foobar 10000
foobar 10000
DROP TABLE t1, t2;
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