BOM按节点排序应用实例
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-- Author : htl258(Tony)
-- Date : 2010-04-23 02:37:28
-- Version:Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86)
-- Jul 9 2008 14:43:34
-- Copyright (c) 1988-2008 Microsoft Corporation
-- Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 3)
-- Subject: BOM按节点排序应用实例
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--实例1:
--> 生成测试数据表:tb
IF NOT OBJECT_ID('[tb]') IS NULL
DROP TABLE [tb]
GO
CREATE TABLE [tb]([id] INT,[code] NVARCHAR(10),[pid] INT,[name] NVARCHAR(10))
INSERT [tb]
SELECT 1,'01',0,N'服装' UNION ALL
SELECT 2,'01',1,N'男装' UNION ALL
SELECT 3,'01',2,N'西装' UNION ALL
SELECT 4,'01',3,N'全毛' UNION ALL
SELECT 5,'02',3,N'化纤' UNION ALL
SELECT 6,'02',2,N'休闲装' UNION ALL
SELECT 7,'02',1,N'女装' UNION ALL
SELECT 8,'01',7,N'套装' UNION ALL
SELECT 9,'02',7,N'职业装' UNION ALL
SELECT 10,'03',7,N'休闲装' UNION ALL
SELECT 11,'04',7,N'西装' UNION ALL
SELECT 12,'01',11,N'全毛' UNION ALL
SELECT 13,'02',11,N'化纤' UNION ALL
SELECT 14,'05',7,N'休闲装'
GO
--SELECT * FROM [tb]
-->SQL查询如下:
;WITH T AS
(
SELECT CAST(CODE AS VARCHAR(20)) AS CODE,*,
CAST(ID AS VARBINARY(MAX)) AS px
FROM tb AS A
WHERE NOT EXISTS(SELECT * FROM tb WHERE id=A.pid)
UNION ALL
SELECT CAST(B.CODE+A.CODE AS VARCHAR(20)),A.*,
CAST(B.px+CAST(A.ID AS VARBINARY) AS VARBINARY(MAX))
FROM tb AS A
JOIN T AS B
ON A.pid=B.id
)
SELECT Code,Name FROM T
ORDER BY px
/*
Code Name
-------------------- ----------
01 服装
0101 男装
010101 西装
01010101 全毛
01010102 化纤
010102 休闲装
0102 女装
010201 套装
010202 职业装
010203 休闲装
010204 西装
01020401 全毛
01020402 化纤
010205 休闲装
(14 行受影响)
*/
--实例2:
--> 生成测试数据表:tb
IF NOT OBJECT_ID('[tb]') IS NULL
DROP TABLE [tb]
GO
CREATE TABLE [tb]([id] INT,[parentid] INT,[categoryname] NVARCHAR(10))
INSERT [tb]
SELECT 1,0,'test1' UNION ALL
SELECT 2,0,'test2' UNION ALL
SELECT 3,1,'test1.1' UNION ALL
SELECT 4,2,'test2.1' UNION ALL
SELECT 5,3,'test1.1.1' UNION ALL
SELECT 6,1,'test1.2'
GO
--SELECT * FROM [tb]
-->SQL查询如下:
;WITH T AS
(
SELECT *,CAST(ID AS VARBINARY(MAX)) AS px
FROM tb AS A
WHERE NOT EXISTS(SELECT * FROM tb WHERE id=A.[parentid])
UNION ALL
SELECT A.*,CAST(B.px+CAST(A.ID AS VARBINARY) AS VARBINARY(MAX))
FROM tb AS A
JOIN T AS B
ON A.[parentid]=B.id
)
SELECT [id],[parentid],[categoryname] FROM T
ORDER BY px
/*
id parentid categoryname
----------- ----------- ------------
1 0 test1
3 1 test1.1
5 3 test1.1.1
6 1 test1.2
2 0 test2
4 2 test2.1
(6 行受影响)
*/