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Sql server触发器示例

作者：黑客防线网安SQL维护基地来源：黑客防线网安SQL维护基地浏览次数：0

本篇关键词： begin rollback

黑客防线网安网讯：==========================================--insert 触发器 create trigger tri_inserton studentfor insert as declare @student_id char(10)select @student_id=s.student_id from stud...

==========================================
--insert 触发器
create trigger tri_insert
on student
for insert
as
declare @student_id char(10)
select @student_id=s.student_id from
student s inner join inserted i
on s.student_id=i.student_id
if @student_id='0000000001'
begin
    raiserror('不能插入1的学号!',16,8)
    rollback tran
end
go ]
===============================================
--update触发器
create trigger tri_update
on student
for update
as
if update(student_id)
begin
    raiserror('学号不能修改!',16,8)
    rollback tran
end
go
==================================--delete触发器
create trigger tri_delete
on student
for delete
as
declare @student_id varchar(10)
select @student_id=student_id from deleted
if @student_id='admin'
begin
    raiserror('错误',16,8)
    rollback tran
end
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