1、最好用触发器
2、语句:
delete 表3
where column5=(select column5 from 表2 where column3='a')delete 表2
where column3='a'delete 表1
where column3='a'
2、语句:
delete 表3
where column5=(select column5 from 表2 where column3='a')delete 表2
where column3='a'delete 表1
where column3='a'
delete 表2 where column3='a'
delete 表1 where column3='a'
2、语句:
delete 表3
where column5=(select column5 from 表2 where column3='a')delete 表2
where column3='a'delete 表1
where column3='a'