我有一个包含3个表的SQL Server数据库，我需要从这些表中创建一个具有层次结构的XML文件。
一个表包含产品：
ProductID ProductLanguageID ProductDefaultShopID ProductNumber ProductName ProductPrice
------------------------------------------------------------------------------------------
100101@@Inc LANG2 Inc 100101 ABC 159,61
100102@@Inc LANG2 Inc 100102 BCD 159,61
100105@@Inc LANG2 Inc 100105 FRE 159,61
100106@@Inc LANG2 Inc 100106 GDE 159,61
第二个有群组
GroupID GroupLanguageID GroupName GroupNumber
------------------------------------------------------------
1@@Inc LANG2 AAA 1
1.01@@Inc LANG2 BBB 1.01
1.02@@Inc LANG2 CCC 1.02
1.03@@Inc LANG2 DDD 1.03
1.12@@Inc LANG2 GGG 1.12
第三语言
LanguageID LanguageCode2 LanguageName
----------------------------------------
LANG1 ES Spain
LANG2 EN English
我还有2个表与另一个表没有任何连接：
集团关系表
GroupRelationsGroupID GroupRelationsParentID
--------------------------------------------
1.01@@Inc 1@@Inc
1.02@@Inc 1@@Inc
1.03@@Inc 1.02@@Inc
1.12@@Inc 1.03@@Inc
集团产品关系表
GroupProductRelationGroupID GroupProductRelationProductID
-------------------------------------------------------------
1.01@@Inc 100101@@Inc
1.03@@Inc 100102@@Inc
1.12@@Inc 100105@@Inc
XML输出应具有以下结构：
<?xml version="1.0" encoding="utf-8"?>
<root>
<productgroup1>
<groupname>AAA</groupname>
<productgroup2>
<groupname>BBB</groupname>
<productgroup3>
<groupname>CCC</groupname>
<products>
<product>
<itemName>ABC</itemName>
<itemNumber>100303</itemNumber>
<itemPrice>159.61</itemPrice>
<ExtraProductgroup>
<extraProductgroupName>GGG</extraProductgroupName>
<itemName>FRE</itemName>
<itemNumber>100305</itemNumber>
<itemPrice>159.61</itemPrice>
</ExtraProductgroup>
</product>
<product>
<itemName>BCD</itemName>
<itemNumber>100302</itemNumber>
<itemPrice>159.61</itemPrice>
</product>
</products>
</productgroup3>
</productgroup2>
</productgroup1>
</root>
我可能只使用T-SQL和C＃（ASP.Net Web窗体）。救命！！！ ： - ）
答案 0 :(得分：0)
我必须承认，我真的怀疑，你会对这个结构感到满意......当产品与level2组相关时，为什么产品低于groupLevel3？为什么ABC和BCD位于同一水平？ ExtraGroup是如何找到的？
此解决方案通常不会解决所有数据，但至少会使用给定数据准确回收所需数据。
CREATE TABLE #Products(ProductID VARCHAR(50),ProductLanguageID VARCHAR(50),ProductNumber INT, ProductName VARCHAR(50), ProductPrice DECIMAL(14,4));
INSERT INTO #Products VALUES
('100101@@Inc','LANG2',100101,'ABC',159.61)
,('100102@@Inc','LANG2',100102,'BCD',159.61)
,('100105@@Inc','LANG2',100105,'FRE',159.61)
,('100106@@Inc','LANG2',100106,'GDE',159.61)
;
CREATE TABLE #Groups(GroupID VARCHAR(50),GroupLanguageID VARCHAR(50),GroupName VARCHAR(50),GroupNumber DECIMAL(5,2));
INSERT INTO #Groups VALUES
('1@@Inc','LANG2','AAA',1)
,('1.01@@Inc','LANG2','BBB',1.01)
,('1.02@@Inc','LANG2','CCC',1.02)
,('1.03@@Inc','LANG2','DDD',1.03)
,('1.12@@Inc','LANG2','GGG',1.12)
;
CREATE TABLE #Languages(LanguageID VARCHAR(50),LanguageCode2 VARCHAR(50),LanguageName VARCHAR(50));
INSERT INTO #Languages VALUES
('LANG1','ES','Spain')
,('LANG2','EN','English');
CREATE TABLE #GroupRelations(GroupRelationsGroupID VARCHAR(50),GroupRelationsParentID VARCHAR(50));
INSERT INTO #GroupRelations VALUES
('1.01@@Inc','1@@Inc')
,('1.02@@Inc','1.01@@Inc')
,('1.03@@Inc','1.02@@Inc')
,('1.12@@Inc','1.03@@Inc');
CREATE TABLE #GroupProductRelations(GroupProductRelationGroupID VARCHAR(50),GroupProductRelationProductID VARCHAR(50));
INSERT INTO #GroupProductRelations VALUES
('1.01@@Inc','100101@@Inc')
,('1.03@@Inc','100102@@Inc')
,('1.12@@Inc','100105@@Inc');
GO
WITH TopGroups AS
(
SELECT gr.GroupID
FROM #Groups AS gr
WHERE NOT EXISTS(SELECT 1 FROM #GroupRelations AS x WHERE gr.GroupID = x.GroupRelationsGroupID)
)
,recGroup AS
(
SELECT 1 AS GroupLevel
,g.GroupID
,g.GroupLanguageID
,g.GroupName
,g.GroupNumber
,gr.GroupRelationsParentID AS ParentGroupID
FROM #Groups AS g
LEFT JOIN #GroupRelations AS gr ON g.GroupID=gr.GroupRelationsGroupID
WHERE gr.GroupRelationsParentID IS NULL
UNION ALL
SELECT prev.GroupLevel + 1
,gNext.GroupID
,gNext.GroupLanguageID
,gNext.GroupName
,gNext.GroupNumber
,grNext.GroupRelationsParentID
FROM #GroupRelations AS grNext
INNER JOIN #Groups AS gNext ON grNext.GroupRelationsGroupID=gNext.GroupID
INNER JOIN recGroup AS prev ON grNext.GroupRelationsParentID=prev.GroupID
)
SELECT *
INTO #tmpFullResult
FROM recGroup
LEFT JOIN #GroupProductRelations AS gp ON recGroup.GroupID=gp.GroupProductRelationGroupID
LEFT JOIN #Products AS p ON gp.GroupProductRelationProductID=p.ProductID
LEFT JOIN #Languages AS l ON p.ProductLanguageID=l.LanguageID;
SELECT * FROM #tmpFullResult;
SELECT lvl1.GroupName AS groupName
,(
SELECT lvl2.GroupName AS groupName
,(
SELECT lvl3.GroupName AS groupName
,(
SELECT prod.ProductName AS itemName
,prod.ProductNumber AS itemNumber
,prod.ProductPrice AS itemPrice
,(
SELECT prodExtra.GroupName AS extraProductGroupName
,prodExtra.ProductName AS itemName
,prodExtra.ProductNumber AS itemNumber
,prodExtra.ProductPrice AS itemPrice
FROM #tmpFullResult AS prodExtra
WHERE prodExtra.ProductID IS NOT NULL
AND prodExtra.GroupLevel=5
FOR XML PATH('ExtraProductgroup'),TYPE
)
FROM #tmpFullResult AS prod
WHERE prod.ProductID IS NOT NULL
AND prod.GroupLevel<5
FOR XML PATH('product'),ROOT('products'),TYPE
)
FROM #tmpFullResult AS lvl3
WHERE lvl3.GroupLevel=3 AND lvl3.ParentGroupID=lvl2.GroupID
FOR XML PATH('productGroup3'),TYPE
)
FROM #tmpFullResult AS lvl2
WHERE lvl2.GroupLevel=2 AND lvl2.ParentGroupID=lvl1.GroupID
FOR XML PATH('productGroup2'),TYPE
)
FROM #tmpFullResult AS lvl1
WHERE lvl1.ParentGroupID IS NULL
FOR XML PATH('productgroup1'),ROOT('root')
GO
DROP TABLE #tmpFullResult;
DROP TABLE #GroupProductRelations
DROP TABLE #Groups
DROP TABLE #GroupRelations
DROP TABLE #Languages
DROP TABLE #Products
结果
<root>
<productgroup1>
<groupName>AAA</groupName>
<productGroup2>
<groupName>BBB</groupName>
<productGroup3>
<groupName>CCC</groupName>
<products>
<product>
<itemName>ABC</itemName>
<itemNumber>100101</itemNumber>
<itemPrice>159.6100</itemPrice>
<ExtraProductgroup>
<extraProductGroupName>GGG</extraProductGroupName>
<itemName>FRE</itemName>
<itemNumber>100105</itemNumber>
<itemPrice>159.6100</itemPrice>
</ExtraProductgroup>
</product>
<product>
<itemName>BCD</itemName>
<itemNumber>100102</itemNumber>
<itemPrice>159.6100</itemPrice>
<ExtraProductgroup>
<extraProductGroupName>GGG</extraProductGroupName>
<itemName>FRE</itemName>
<itemNumber>100105</itemNumber>
<itemPrice>159.6100</itemPrice>
</ExtraProductgroup>
</product>
</products>
</productGroup3>
</productGroup2>
</productgroup1>
</root>