stop slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
reset master;
reset slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
start slave;
CREATE TABLE t1 (
a int unsigned not null auto_increment primary key,
b int unsigned
) ENGINE=MyISAM;
CREATE TABLE t2 (
a int unsigned not null auto_increment primary key,
b int unsigned
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (NULL, 0);
INSERT INTO t1 SELECT NULL, 0 FROM t1;
INSERT INTO t2 VALUES (NULL, 0), (NULL,1);
SELECT * FROM t1 ORDER BY a;
a	b
1	0
2	0
SELECT * FROM t2 ORDER BY a;
a	b
1	0
2	1
UPDATE t1, t2 SET t1.b = t2.b WHERE t1.a = t2.a;
delete from t1;
delete from t2;
insert into t1 values(1,1);
insert into t2 values(1,1);
update t1 set a=2;
UPDATE t1, t2 SET t1.a = t2.a;
select * from t1;
a	b
1	1
select * from t2;
a	b
1	1
drop table t1, t2;