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;