[SQL]声明触发器 <待整理>

5./*声明触发器

create trigger dl_stu_mess4 on student for delete

as

declare @name_id int

select @name_id=stu.name from student stu,deleted d where stu.name=d.name

if exists(select * from books where books.name=@name_id)

delete from books where books.name=@name_id

print 'jhsdjkjk'

print @name_id

*/

/*

create trigger dl_stu_mess3 on books for delete

as

declare @name_id int

select @name_id=bo.name from books bo,deleted d where bo.name=d.name

if exists(select * from student where student.name=@name_id)

delete from student where student.name=@name_id

print 'jhsdjkjk'

print @name_id

*/

--sp_depends books 查看触发器

--sp_helptrigger student; 查看触发器信息

--drop trigger dl_stu_mess4; 删除触发器

insert into student values(2,'4jkjjk','d','j','shs');

--delete from student where stu.name=2; 删除操作

select * from student;

--delete from books where books.name='2'

--select * from books;