我用了两条语句：
1.delete from cars1 where 时间 < DATEADD(day,-3,getdate())
2.select * from cars1 where 时间 < DATEADD(day,-3,getdate())


为什么我都是用where 时间 < DATEADD(day,-3,getdate())当条件，但是结果相反呢？
DELETE删除的是大于的时间（相反了）
SELECT可正常。为什么呢？

使用SQL2000 SERVER

找到原因了。发上来大家看看。不过要谢谢各位网友了。

select * from cars1 where 时间 < CONVERT(DATETIME,DATEADD(day,-3,getdate()),121)
delete from cars1 where 时间 < CONVERT(DATETIME,DATEADD(day,-3,getdate()),121)

呵呵，都是高手。。。我还在C语言遨游呢。。

对了，上面的语句有的机子还是不行，改成这样了，把存储过程发上来。



if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[DELCars1]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[DELCars1]
GO

SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO

CREATE PROCEDURE DELCars1
AS
DECLARE @Row1 smallint
BEGIN TRANSACTION
INSERT INTO CarsSer Select * from cars1 where datediff(day,时间,getdate())>=3
SET @Row1=@@rowcount
IF @@ERROR<>0
BEGIN
ROLLBACK TRANSACTION
RETURN 1
END
Delete from cars1 where datediff(day,时间,getdate())>=3
IF @@ERROR<>0 OR @@rowcount<>@Row1
BEGIN
ROLLBACK TRANSACTION
RETURN 1
END
COMMIT TRANSACTION
RETURN 0
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO