一条赋值变量引发的巨坑,自己备注一下,浪费了不少时间
这边关键字,我都用了大写,方便观看
FOR EACH ROW BEGIN
//变量的声明
DECLARE num INT(11);
//赋值
UPDATE count_table SET count_num=num,update_time=SYSDATE() WHERE table_name="user_t";
END
//删除的实例
CREATE TRIGGER account_delete_info AFTER DELETE ON sys_account_infoFOR EACH ROW BEGIN
DECLARE deleteid INT(11);
//保险起见
SET deleteid =0;
//直接获取不到,得先存一下 这是个小坑
SET deleteid = OLD.id;
//保险起见 ,确保在获得值的时候删除
IF deleteid!=0 THEN
DELETE from sys_user_info where sys_user_info.account_id=deleteid;
end if ;
END
//删除触发器
drop TRIGGER account_delete_info;