sql server trigger

最新推荐文章于 2025-04-23 14:17:09 发布

原创最新推荐文章于 2025-04-23 14:17:09 发布 · 377 阅读

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文章标签：

#server #sql #insert #delete #脚本

trigger 同时被 2 个专栏收录

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本文详细介绍了SQL触发器在数据库操作中的应用，包括插入触发器、更新触发器和删除触发器的创建过程及作用。

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Insert：

USE [master]
GO
/****** 对象: Trigger [Insert_A] 脚本日期: 09/26/2012 16:57:36 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE trigger [Insert_A] on [dbo].[A]
for insert
as
begin
declare @id int
select @id = id from inserted
insert into B(id) values (@id)
end

Update：

USE [master]
GO
/****** 对象: Trigger [Update_A]    脚本日期: 09/26/2012 16:57:40 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
create trigger [Update_A] on [dbo].[A]
after update
as
begin

  declare @i int
  declare @k int
select @i = id from Deleted
    select @k = id from inserted
update B set id=@k where id=@i
end

Delete：

USE [master]
GO
/****** 对象: Trigger [Delete_A]    脚本日期: 09/26/2012 16:57:42 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
create trigger [Delete_A] on [dbo].[A]
for delete
as
begin
    declare @i int
select @i = id from Deleted
delete from B where id=@i
end