MySQL 触发器的问题：如何得到delete操作的结果集？
MS SQL Server 里面，有一个Deleted临时表，MySQL 该如何去操作？
MS SQL Server:
CREATE TRIGGER `dbname`.`triggername` AFTER DELETE
ON dbname.table1 FOR EACH ROW
BEGIN
delete from table2 where id in
(select idfrom Deleted);
END;
其他insert,update操作后的临时表又存在不？该如何操作？
刚接触MySQL时间不长，请大虾们多多指教。
MYSQL 中的临时表叫做OLD
delete from table2 where id in
(select id from OLD);
CREATE TRIGGER `dbname`.`triggername` AFTER DELETE
ON dbname.table1 FOR EACH ROW
BEGIN
delete from table2 where id in
(select id from OLD);
END;
-
SQL code
DELIMITER $$ DROP TRIGGER /*!50114 IF EXISTS */ `test`.`tr_delete`$$ CREATE TRIGGER `test`.`tr_delete` AFTER DELETE on `test`.`t11_replicas` FOR EACH ROW BEGIN delete from t11 where id = old.id; END$$ DELIMITER ; select * from t11_replicas where id =2; query result(1 records) id str 2 This is a test 2 select * from t11 where id =2; query result(1 records) id str 2 23434343 delete from t11_replicas where id =2; (1 row(s)affected) (0 ms taken) select * from t11 where id =2; Empty set (0.00 sec)
不能够直接(select id from OLD)的，只能通过 （old|new).列名 的方式使用。
OLD 表示操作前的表
NEW 表示操作后的表
OLD.status 就是 表 更新或插入删除前对应记录的status字段值
NEW.status 就是 表 更新或插入删除后对应记录的status字段值
还有一点，对于INSERT语句,只有NEW是合法的；对于DELETE语句，只有OLD才合法；而UPDATE语句可以在和NEW以及OLD同时使用。
