sql-server数据库中利用触发器实现表与表之间的级联删除

create trigger Delete_Student --创建一个触发器
on student 
instead of delete 
as
  declare @sno varchar(20)  
  select @sno= sno from  deleted
  delete from score  where sno=@sno
  delete from student where sno=@sno
go 
 delete from Student where Sno='101'
 select *from Student 
 select *from Score