查询某个编号的批次范围

如何通过下面源表的数据查询得到目标表的数据?

源表：
批次 编号
1 1000
1 1001
2 1000
3 1001
4 1000
5 1000
目标表：
编号 起始批次 结束批次
1000 1 2
1001 1 1
1001 3 3
1000 4 5

/*---------------------------------
-- Author : htl258(Tony)
-- Date : 2009-09-11 18:24:47
-- Version: Microsoft SQL Server 2008 (SP1) - 10.0.2531.0 (Intel X86)
Mar 29 2009 10:27:29
Copyright (c) 1988-2008 Microsoft Corporation
Enterprise Evaluation Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 2)

---------------------------------*/
--> 生成测试数据表:源表

IF NOT OBJECT_ID('[源表]') IS NULL
DROP TABLE [源表]
GO
CREATE TABLE [源表]([批次] int,[编号] int)
INSERT [源表]
SELECT 1,1000 UNION ALL
SELECT 1,1001 UNION ALL
SELECT 2,1000 UNION ALL
SELECT 3,1001 UNION ALL
SELECT 4,1000 UNION ALL
SELECT 5,1000
GO
--SELECT * FROM [源表]

-->SQL2000查询如下:
SELECT a.编号,a.批次 起始批次,MIN(b.批次) 结束批次
FROM (
SELECT * FROM [源表] t
WHERE NOT EXISTS(
SELECT 1 FROM 源表
WHERE 编号=T.编号 AND T.批次=批次+1)
) AS a
INNER JOIN (
SELECT * FROM [源表] t
WHERE NOT EXISTS(
SELECT 1 FROM 源表
WHERE 编号=T.编号 AND 批次=T.批次+1)
) AS b
ON a.批次<=b.批次 AND a.编号=b.编号
GROUP BY a.批次,a.编号

-->SQL2005查询如下:

SELECT a.编号,a.批次 起始批次,b.批次 结束批次
FROM (
SELECT rn=ROW_NUMBER()OVER(ORDER BY 编号,批次),* FROM [源表] t
WHERE NOT EXISTS(
SELECT 1 FROM 源表
WHERE 编号=T.编号 AND T.批次=批次+1)
) AS a
INNER JOIN (
SELECT rn=ROW_NUMBER()OVER(ORDER BY 编号,批次),* FROM [源表] t
WHERE NOT EXISTS(
SELECT 1 FROM 源表
WHERE 编号=T.编号 AND 批次=T.批次+1)
) AS b
ON a.rn=b.rn

/*
编号 起始批次 结束批次
----------- ----------- -----------
1000 1 2
1000 4 5
1001 1 1
1001 3 3

(4 行受影响)
*/