Question

问题：我想在＆＃39;组中添加更多数据。在包含其他子字段的父XML字段内。

查询：我可以将相同的详细信息捆绑到一个字段中，以节省文件大小和导入时间。

<ParentField Field1="1" Field2="X" Field3="SomeText">

此外，我正在努力做好练习，或者我应该保留我所拥有的

在UPRN之上的某些字段（如数据）也可以进入父值。我见过这样的代码：

使用我拥有的SQL代码，我该如何修改它？（下面的片段）

USE DATABASE

SELECT      
      e.GroupFieldName,

      (SELECT 
      c.ShouldBeParent AS ShouldBeParent
      ,c.ChildIsOkayHere AS ChildIsOkayHere

      FROM TblTableC c
      WHERE c.GroupFieldName = e.GroupFieldName 
      FOR XML PATH('LineItem'), type
      )

  FROM TblTableE e
  JOIN
  TblTableC c 
  ON e.GroupFieldName = c.UPRN  

  GROUP BY e.UPRN

FOR XML PATH('GroupFieldName') , ROOT ('SURVEYDATA')

示例（我所拥有的）：

<SURVEYDATA>
  <UPRN_GROUP>
    <UPRN>SH1001</UPRN>
 <CHILD>
      <Field1>Some Text </Field1>
</CHILD> 
<CHILD>
      <Field1>Some Other Text </Field1>
</CHILD> 
  </UPRN_GROUP>
  <UPRN_GROUP>
    <UPRN>SH1001</UPRN>
 <CHILD>
      <Field1>Some Text </Field1>
</CHILD> 
<CHILD>
      <Field1>Some Other Text </Field1>
</CHILD> 
  </UPRN_GROUP>
</SURVEYDATA>

Answer 1

我认为您必须自己找到解决方案，因为您提供的信息不足。阅读FOR XML PATH。

下面你会发现一堆陈述。将它们复制到一个空的查询窗口并执行。特别注意我命名列的方式。带有“@”的名称将是属性，“纯”名称将是元素。

DECLARE @tbl TABLE(id INT, Caption VARCHAR(100));
INSERT INTO @tbl VALUES(1,'Caption 1'),(2,'Caption 2'),(3,'Caption 3');

DECLARE @tblChildren TABLE(id INT,ParentId INT,Caption VARCHAR(100));
INSERt INTO @tblChildren VALUES(1,1,'Caption 1.1'),(2,1,'Caption 1.2'),(3,1,'Caption 1.3')
                              ,(4,2,'Caption 2.1'),(5,2,'Caption 2.2')
                              ,(6,3,'Caption 3.1');

--Simple SELECT
SELECT tbl.id AS ParentId
      ,tbl.Caption AS ParentCaption
      ,ch.id AS ChildId 
      ,ch.Caption AS ChildCaption
FROM @tbl AS tbl
INNER JOIN @tblChildren AS ch ON tbl.id=ch.ParentId;

--XML with elements and attributes (play around with this...)
--Children are not nested...
SELECT tbl.Caption AS [Parent/@Caption]
      ,tbl.id AS [Parent/@Id]
      ,ch.Caption AS [Child/@Caption]
      ,ch.id AS [Child/@Id] 
FROM @tbl AS tbl
INNER JOIN @tblChildren AS ch ON tbl.id=ch.ParentId
FOR XML PATH('row'),ROOT('root');

--XML with elements and attributes (play around with this...)
--Children are blocked...
SELECT tbl.Caption AS [Parent/@ParentCaption]
      ,tbl.id AS [Parent/@Id]
      ,(SELECT id AS [@id]
              ,Caption AS [@Caption]
        FROM @tblChildren 
        WHERE ParentId=tbl.id
        FOR XML PATH('Child'),ROOT('Children'),TYPE
        )
FROM @tbl AS tbl
FOR XML PATH('row'),ROOT('root');

--XML with elements and attributes (play around with this...)
--Children are nested...
--No row-tag needed, as everything is nested
SELECT tbl.Caption AS [Parent/@ParentCaption]
      ,tbl.id AS [Parent/@Id]
      ,(SELECT id AS [@id]
              ,Caption AS [@Caption]
        FROM @tblChildren 
        WHERE ParentId=tbl.id
        FOR XML PATH('Child'),TYPE
        ) AS [Parent/Children]
FROM @tbl AS tbl
FOR XML PATH(''),ROOT('root');

将多个字段放入带有SQL for XML的字段名称中

1 个答案: