sql 触发器使用例子

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。

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：

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：

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