触发器错误,谢谢

[nalnait]

USE Store
IF EXISTS (SELECT name FROM sysobjects
WHERE name = 'Contract_Detail' AND type = 'TR')
DROP TRIGGER Contract_Detail
GO
CREATE TRIGGER Contract_Detail
ON ContractInfo
FOR INSERT
AS

DECLARE @Cid char(10),
@Pid char(10),
@Clid char(10),
@Cprice money,
@Csum int,
@Cfinish datetime,
@Cstate varchar(6)
BEGIN
SELECT @Cid=[ContractId],@Pid=PsT.ProductId,@Clid=[ClientId],@Csum=[ContractSum], @Cstate=[ContractState],@Cfinish=[ContractFinish] FROM inserted as IsT ,ProductInfo as PsT
where IsT.ProductId=PsT.ProductId
if(@Cstate='完成')
INSERT INTO [Store].[dbo].[DetailInfo]([ContractId], [ProductId], [ClientId], [ProductPrice], [ProductSum], [ContractFinish])
VALUES(@Cid,@Pid,@Clid,@Cprice,@Csum,@Cfinish)
end
//上面是不能插入表[DetailInfo]内的代码,奇怪的是若把where IsT.ProductId=PsT.ProductId 去掉则可以
//为什么,希望指点,头大了,谢谢~~~~~~~~

[正牌风哥]

SELECT @Cid=[ContractId],@Pid=PsT.ProductId,@Clid=[ClientId],@Csum=[ContractSum], @Cstate=[ContractState],@Cfinish=[ContractFinish]
--------这一段列名指定表别名

[-狙击手-]

CREATE   TRIGGER   Contract_Detail 
ON   ContractInfo 
FOR   INSERT 
AS 

DECLARE   @Cid   char(10), 
@Pid   char(10), 
@Clid   char(10), 
@Cprice   money, 
@Csum   int, 
@Cfinish   datetime, 
@Cstate   varchar(6) 
BEGIN 

INSERT   INTO   [Store].[dbo].[DetailInfo]([ContractId],   [ProductId],   [ClientId],   [ProductPrice],   [ProductSum],   [ContractFinish]) 
SELECT     @Cid=[ContractId],@Pid=PsT.ProductId,@Clid=[ClientId],@Csum=[ContractSum],   @Cstate=[ContractState],@Cfinish=[ContractFinish]   
FROM     inserted   
where [ContractState] = '完成'
end 

[nalnait]

谢谢两位快速的反应........