sql 触发器使用例子

2020-07-25 13:33:05

字体：大中小

来源：转载

供稿：网友

inserted,deleted是在触发器中使用的两个临时表，当执行insert操作时，在inserted中存储着当前插入的记录，在执行delete操作时，在deleted中存储着当前删除的记录,当执行update时，在inserted中存储着修改后的记录，在deleted中存储着修改前的记录。

复制代码代码如下:

set ANSI_NULLS ON 
set QUOTED_IDENTIFIER ON 
go 

ALTER TRIGGER [dnt_user_add] 
ON [dbo].[dnt_users] 
AFTER INSERT 
AS 
BEGIN 
SET NOCOUNT ON; 
insert into [dnt_userfields](uid) 
select uid from inserted 

END 

删除：

复制代码代码如下:

SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 

CREATE TRIGGER [dnt_users_del] 
ON [dnt_users] 
AFTER DELETE 
AS 
BEGIN 

SET NOCOUNT ON; 
delete [dnt_userfields] from deleted where [dnt_userfields].uid=deleted.uid 

END 
GO 

修改：

复制代码代码如下:

SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 

ALTER TRIGGER [dnt_users_up] 
ON [dnt_users] 
AFTER UPDATE 
AS 
BEGIN 

SET NOCOUNT ON; 
UPDATE [dnt_userfields] Set icq = inserted.uid from inserted where [dnt_userfields].uid = inserted.uid 

END 
GO 