復(fù)制代碼 代碼如下:

CREATE TRIGGER <trigger name>
ON <table or view>
{{{FOR|AFTER} <[INSERT] [,] [UPDATE],[DELETE]>}|INSTEAN OF}
AS
<sql statement>

復(fù)制代碼 代碼如下:

--有兩張表，客戶表和項(xiàng)目表，要求：新建項(xiàng)目時(shí)自動(dòng)生成項(xiàng)目編號(hào)，每個(gè)不同的客戶的項(xiàng)目的編號(hào)從1開始
--項(xiàng)目編號(hào)格式為PJ+"-"+"客戶編號(hào)"+"-"+"日期"+"-"+"流水號(hào)"
--如項(xiàng)目編號(hào)：PJ-ABCD-120805-0001
create table testAccount --創(chuàng)建測(cè)試客戶表
(
tAccName nvarchar(100), --客戶姓名
tAccId nvarchar(32) --客戶編號(hào)
)
create table testProject --創(chuàng)建測(cè)試項(xiàng)目表
(
tProName nvarchar(100), --項(xiàng)目名稱
tProId nvarchar(32), --項(xiàng)目編號(hào)
tIdAcc nvarchar(100), --客戶編號(hào)
tProGuid nvarchar(64) --guid
)
go
create trigger T_AutoNumber
on testProject
after insert
as
begin
declare @one nvarchar(8), --編號(hào)第一部分，PJ
@two nvarchar(32), --編號(hào)第二部分，客戶編號(hào)
@three nvarchar(8), --編號(hào)第三部分，日期
@four int, --編號(hào)第四部分，流水號(hào)
@guid nvarchar(64) --guid
set @one='PJ'
set @three= convert( varchar(8),GETDATE(),112)
--從Inserted副本表里獲取當(dāng)前插入數(shù)據(jù)的客戶編碼和guid
select @two=tIdAcc,@guid=tProGuid from Inserted
--獲取編號(hào)最后四位
select @four=max(cast(right(tProId,4)as int))
from testProject
where tIdAcc=@two
--對(duì)每一個(gè)新客戶的流水號(hào)都是從1開始，已存在客戶為最大流水號(hào)加1
if @four is null
set @four=0
else
set @four=cast(@four as int)
set @four=@four+1
update testProject set tProId=@one+'-'+@two+'-'+@three+'-'+right('0000'+cast(@four as varchar),4) where tProGuid=@guid
end
go
--生成測(cè)試表數(shù)據(jù)
insert into testAccount values ('小小鴨有限公司','XXYGS')
insert into testAccount values ('丑小鴨有限公司','CXY')
insert into testProject (tProName,tIdAcc,tProGuid)values ('小鴨成長項(xiàng)目','XXYGS',newid())
insert into testProject (tProName,tIdAcc,tProGuid)values ('小鴨學(xué)游泳項(xiàng)目','XXYGS',newid())
insert into testProject (tProName,tIdAcc,tProGuid)values ('丑小鴨成長項(xiàng)目','CXY',newid())
select * from testProject
drop table testAccount
drop table testProject

復(fù)制代碼 代碼如下:

begin tran
insert into testProject (tProName,tIdAcc,tProGuid)values ('小鴨成長項(xiàng)目','XXYGS',newid())
insert into testProject (tProName,tIdAcc,tProGuid)values ('小鴨學(xué)游泳項(xiàng)目','XXYGS',newid())
insert into testProject (tProName,tIdAcc,tProGuid)values ('丑小鴨成長項(xiàng)目','CXY',newid())
if @@TRANCOUNT>0
rollback tran