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ID DATE_TIME
1 2010Äê3ÔÂ31ÈÕ 15:14:46
2 2010Äê3ÔÂ31ÈÕ 15:20:54
3 2010Äê3ÔÂ31ÈÕ 15:23:01
4 2010Äê3ÔÂ31ÈÕ 15:25:06
5 2010Äê3ÔÂ31ÈÕ 15:45:11

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SQL code:
--------------------------------------------------------------------------
-- Author : htl258(Tony)
-- Date : 2010-03-31 15:27:35
-- Version:Microsoft SQL Server 2008 (SP1) - 10.0.2531.0 (Intel X86)
-- Mar 29 2009 10:27:29
-- Copyright (c) 1988-2008 Microsoft Corporation
-- Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 2)
--------------------------------------------------------------------------
--> Éú³É²âÊÔÊý¾Ý±í:tb

IF NOT OBJECT_ID('[tb]') IS NULL
DROP TABLE [tb]
GO
CREATE TABLE [tb]([ID] INT,[DATE_TIME] DATETIME)
INSERT [tb]
SELECT 1,N'2010-3-31 15:14:46' UNION ALL
SELECT 2,N'2010-3-31 15:20:54' UNION ALL
SELECT 3,N'2010-3-31 15:23:01' UNION ALL
SELECT 6,N'2010-3-31 15:25:06' UNION ALL
SELECT 8,N'2010-3-31 15:45:11'
GO
--SELECT * from [tb]

-->SQL²éѯÈçÏÂ:

;with t as
(
select rn=ROW_NUMBER()over(order by id),*
from tb
)
select a.DATE_TIME a,isnull(b.DATE_TIME,a.DATE_TIME) b,
DATEDIFF(mi,a.DATE_TIME,isnull(b.DATE_TIME,a.DATE_TIM


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