Question

所以我有一个包含5个表的数据库，所有表都包含各种数据。表1称为dbo.Business，表2称为dbo.Constraints，表3称为dbo.Features，表4称为dbo.Interfaces，表5称为dbo.Modules。使用这些表中的数据，我正在尝试使用格式

创建XML文档

<Lin key="####">     <----- comes from table 1
  <G ID="####">  <----- comes from table 1
    <Constraints>
        <Security>2</Security>   <----- more data like this, all comes from table 2   
    </Constraints>
    <Modules>
        <Module id="1" name="DV" registered="false"/>   <----- more data like this, all comes from table 5
    </Modules>
    <Features>
        <Feature id="0" name="DEC" registered="true" expiration=""/>    <----- more data like this, all comes from table 3
    </Features>
    <Interfaces>
        <Interface id="1" name="SI" registered="false" expiration="" rulename="HIS"/>  <----- more data like this, all comes from table 4
    </Interfaces>
  </G> 
</Lin>

我不能为我的生活弄清楚如何让这样的XML文档出来（我上周开始学习SQL）。任何和所有的帮助将不胜感激。谢谢你的时间！

---------------编辑：

所以在你的帮助下，我已经成功地将我的xml的MOST格式化为我想要的样子，但并不完全。我目前的疑问是：

SELECT OrgID as SomeID, Licensingkey as SomeKey INTO Business FROM TestDB.dbo.Business 

SELECT ProductName as SecurityConstraint, Amount as Number INTO Constraints FROM TestDB.dbo.Constraints 

SELECT FeatureID as id, FeatureName as name, Included as registered, Expiration as expiration INTO Features FROM TestDB.dbo.Features

SELECT ModuleID as id, ProductName as name, Included as registered INTO Modules FROM TestDB.dbo.Modules

SELECT InterfaceID as id, InterfaceName as name, Included as registered, Expiration as expiration, RuleName as rules INTO Interfaces FROM TestDB.dbo.Interfaces

SELECT SomeKey AS [@key]
      ,SomeID AS [G/@OrgID]

  ,(SELECT Constraints.Number 
    FROM Constraints 
    FOR XML PATH(''),TYPE
   ) AS [G/Constraints]

   ,(SELECT Modules.registered AS [@registered] 
          ,Modules.name AS [@name]
          ,Modules.id AS [@id]
    FROM Modules 
    FOR XML PATH('Module'),TYPE
   ) AS [G/Modules]

  ,(SELECT Features.registered AS [@registered] 
          ,Features.name AS [@name]
          ,Features.id AS [@id]
          ,IsNull(cast(Features.expiration as varchar(10)), '' ) AS [@expiration]
    FROM Features 
    FOR XML PATH('Feature'),TYPE
   ) AS [G/Features]

   ,(SELECT Interfaces.registered AS [@registered] 
          ,Interfaces.name AS [@name]
          ,Interfaces.id AS [@id]
          ,IsNull(cast(Interfaces.expiration as varchar(10)), '' ) AS [@expiration]
          ,Interfaces.rules as [@rulename]
    FROM Interfaces
    FOR XML PATH('Interface'),TYPE
   ) AS [G/Interfaces]

FROM Business
FOR XML PATH('Lin')
DROP TABLE master.dbo.Business, master.dbo.Constraints, master.dbo.Features, master.dbo.Modules, master.dbo.Interfaces
GO

我现在唯一的问题是我的Constraints部分目前看起来像这样

<Constraints>
  <Number>4</Number>
  <SecurityConstraint>Security</SecurityConstraint>
  <Number>400</Number>
  <SecurityConstraint>InSecurity</SecurityConstraint>
  <Number>400</Number>
  <SecurityConstraint>LoggedUsers</SecurityConstraint>
  <Number>2</Number>
  <SecurityConstraint>Lend</SecurityConstraint>
</Constraints>

当我需要它时看起来像

<Constraints>
 <Security>4</Security>
 <InSecurity>400</InSecurity>
 <LoggedUsers>400</LoggedUsers>
 <Lend>2</Lend>
</Constraints>

我将如何解决这个最终问题？非常感谢你！

Answer 1

试试这样：

DECLARE @t1 TABLE(SomeKey VARCHAR(10), SomeID INT);
INSERT INTO @t1 VALUES('Key1',1);

DECLARE @t2 TABLE(SecurityConstraint INT);
INSERT INTO @t2 VALUES(2);

DECLARE @t3 TABLE(id INT,name VARCHAR(100),registered BIT);
INSERT INTO @t3 VALUES(1,'DV',0);

SELECT SomeKey AS [@key]
      ,SomeID AS [G/@ID]

      ,(SELECT t2.SecurityConstraint AS [Security] 
        FROM @t2 AS t2
        FOR XML PATH(''),TYPE
       ) AS [G/Constraints]

      ,(SELECT t3.id AS [@id]
              ,t3.name AS [@name]
              ,t3.registered AS [@registered] 
        FROM @t3 AS t3
        FOR XML PATH('Module'),TYPE
       ) AS [G/Modules]

       --Other tables similar...
FROM @t1 AS t1
FOR XML PATH('Lin')

结果

<Lin key="Key1">
  <G ID="1">
    <Constraints>
      <Security>2</Security>
    </Constraints>
    <Modules>
      <Module id="1" name="DV" registered="0" />
    </Modules>
  </G>
</Lin>

更新

对于您的其他问题（实际上应该是一个新问题），请尝试以下方法：

DECLARE @tbl TABLE(SecurityConstraint VARCHAR(100),Amount INT);
INSERT INTO @tbl VALUES
 ('Security',4)
,('InSecurity',400)
,('LoggedUser',400)
,('Lend',2);

SELECT CASE WHEN SecurityConstraint='Security' THEN Amount ELSE NULL END AS [Security]
      ,CASE WHEN SecurityConstraint='InSecurity' THEN Amount ELSE NULL END AS [InSecurity]
      ,CASE WHEN SecurityConstraint='LoggedUser' THEN Amount ELSE NULL END AS LoggedUser
      ,CASE WHEN SecurityConstraint='Lend' THEN Amount ELSE NULL END AS Lend
FROM @tbl
FOR XML PATH(''),ROOT('Constraints')

产生此结果

<Constraints>
  <Security>4</Security>
  <InSecurity>400</InSecurity>
  <LoggedUser>400</LoggedUser>
  <Lend>2</Lend>
</Constraints>

使用SQL Server创建XML文档

1 个答案:

更新