Question

我试图设置一个触发器，它会通过从另一个表中插入一些额外的数据来更新同一行。字段receive.iccid是空白的，我希望每次插入都更新它。但是这个触发器不起作用

delimiter //
CREATE TRIGGER ins_iccid 
AFTER INSERT ON receive 
FOR EACH ROW 
BEGIN
UPDATE receive SET NEW.iccid = (SELECT goip.iccid FROM goip WHERE NEW.goipname=goip.name);
END// 

delimiter ;

Answer 1

原来我需要使用'BEFORE INSERT'来实现我想要的东西

 CREATE TRIGGER `ins_iccid` BEFORE INSERT ON `receive`
 FOR EACH ROW 
 BEGIN
    SET NEW.iccid = (SELECT goip.iccid FROM goip WHERE NEW.goipname=goip.name);
 END

mysql触发器从另一个表更新同一个表

1 个答案: