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sql 触发器使用例子

来源:互联网 作者:佚名 时间:2022-05-14 23:17
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
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
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