DROP TABLE IF EXISTS t1,t2; CREATE TABLE t1 (a , b ) ENGINE= ; 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; DELETE FROM t1 WHERE b IN ('c'); SELECT a,b FROM t1; a b 1 a 1 a 10000 foobar 10000 foobar 2 b 2 b 4 d 4 d 5 e 5 e DELETE FROM t1 WHERE a < 0 OR b = 'a'; SELECT a,b FROM t1; a b 10000 foobar 10000 foobar 2 b 2 b 4 d 4 d 5 e 5 e DELETE FROM t1 WHERE a <= 4 ORDER BY b DESC LIMIT 1; SELECT a,b FROM t1; a b 10000 foobar 10000 foobar 2 b 2 b 4 d 5 e 5 e CREATE TABLE t2 (c , d ) ENGINE= ; INSERT INTO t2 (c,d) SELECT b, a FROM t1; SELECT c,d FROM t2; c d b 2 b 2 d 4 e 5 e 5 foobar 10000 foobar 10000 DELETE t2.* FROM t1, t2 WHERE c < b AND a + d != 1; SELECT a,b FROM t1; a b 10000 foobar 10000 foobar 2 b 2 b 4 d 5 e 5 e SELECT c,d FROM t2; c d foobar 10000 foobar 10000 DELETE FROM t2, t1.* USING t2, t1 WHERE c = 'foobar' and b = c; SELECT a,b FROM t1; a b 2 b 2 b 4 d 5 e 5 e SELECT c,d FROM t2; c d DELETE FROM t1; SELECT a,b FROM t1; a b DROP TABLE t1, t2;