?????? 以前没写过SqlServer的触发器,折腾了一天,总算写好了,现在记录一下心得。
?????? SqlServer触发器的语法就不提了,主要记录一下主要事项。每个开始都得有Begin? 内容? end?? ,之前不明白这里,写条件触发折腾了好多遍都是不准确,以下是实例:
?????
??????if (object_id('insert_black_list','tr') is not null)??? drop trigger insert_black_list go create TRIGGER insert_black_list ??? on User_Infor_Message ??? after insert ??? as ??? declare @messagetype varchar(1) ??? declare @cardno varchar(10) ??? BEGIN ???? select @messagetype = messagetype,@cardno=cardno from User_Infor_Message ???? if @messagetype='1' or @messagetype='5' ???????? begin ?????????? if (select count(cardno) from Balck_List where cardno=@cardno)=0 ????????????? begin ??????????????? insert into Balck_List select Inserted.cardno,Inserted.cardid,convert(varchar(8),getdate(),112) from Inserted ????????????? end ???????? end ???? else if @messagetype='6' ?????? begin ????????? delete from Balck_List where cardno=@cardno ?????? end ??? END ?go
(编辑:李大同)
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