MYSQL触发器的使用_MySQL
bitsCN.com
mysql触发器格式为 create trigger trigger_name after/before insert/update/delete on one_table for each row your_sql; 红色部分为自己命名的，蓝色部分为选择一个值，黑色部分必有，最后的绿色部分为你想出发的SQL语句； mysql中关于两个table连接操作update方法为（mysql在此处不使用join语句）： update A,B set A.a2 = B.b2 where A.A1 = B.B1 and B.B2 = "XXX"其中A、B为用户所建立的表名a2、b2为表下的属性值； mysql中使用触发器获得刚刚插入的数据关键字为NEW，即（本人对数据库的命名习惯不好）： table1： records（accountid，date， month， week，income，expend ，remark）； table2： Rweek（ week，Wincome， Wexpend）； 触发器为实现table1插入一组数据，table2针对对应的week值进行相应的汇总： create trigger t1 after insert on records for each row update Rweek set Rweek.Wincome=Rweek.Wincome+NEW.income,Rweek.Wexpend=Rweek.Wexpend+NEW.expend where Rweek.week=NEW.week; 作者 Chanthon bitsCN.com
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