sql - 如何使用 T-SQL 格式化 XML

Question

我有一个名为 StoreFolder 的表，其中包含一个名为 FolderXml 的 XML 字段。每行包含一个 XML 值，如下所示：

<Folder FolderName="test" StoreName="TestStore" />

我需要获取以下 XML 格式的文件夹：

<Folders>
  <Folder FolderName="test1" StoreName="TestStore1" />
  <Folder FolderName="test2" StoreName="TestStore1" />
  <Folder FolderName="test3" StoreName="TestStore1" />
</Folders>

我尝试使用以下 SQL 语句：

SELECT   FolderXml
FROM     StoreFolder
FOR XML PATH(''), ROOT('Folders')

但它输出以下 XML：

<Folders>
  <FolderXml>
    <Folder FolderName="test1" StoreName="TestStore1" />
  </FolderXml>
  <FolderXml>
    <Folder FolderName="test2" StoreName="TestStore1" />
  </FolderXml>
  <FolderXml>
    <Folder FolderName="test3" StoreName="TestStore1" />
  </FolderXml>
</Folders>

有人可以告诉我如何获取以下格式的 XML（使用 T-SQL）：

<Folders>
  <Folder FolderName="test1" StoreName="TestStore1" />
  <Folder FolderName="test2" StoreName="TestStore1" />
  <Folder FolderName="test3" StoreName="TestStore1" />
</Folders>

非常感谢

Answer 1

您只是缺少转换/转换操作：

select Convert(Xml, FolderXml)
  from StoreFolder
for xml path(''), root('Folders')

您的FolderXml字段被视为 varchar/nvarchar 字段，然后添加到 Xml 节点中。预先将其转换为 Xml 以确保它不会被包装在父标记中。

Answer 2

select FolderName as "@foldername",StoreName as "@StoreName"
FROM StoreFolder
FOR XML PATH('Folder'),ROOT('Folder')

Answer 3

DECLARE @T TABLE(
    FolderXml XML
)

INSERT INTO @T VALUES
('<Folder FolderName="test1" StoreName="TestStore1" />'),
('<Folder FolderName="test2" StoreName="TestStore1" />'),
('<Folder FolderName="test3" StoreName="TestStore1" />')


SELECT (SELECT T.FolderXml)
FROM @T AS T
FOR XML PATH (''), ROOT('Folders')