在 SQL Server 中删除 XML 个匹配属性条件的节点

Question

我想删除 XML 数据类型列中的所有节点；匹配所有 records.For 示例 <resource> 节点的属性条件，该节点具有属性 "type"，其值类似于 '%audio%'.

输入：

<metadata Item="1234" version="5" packageVersion="5" xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2">
  <contents>
    <content version="0" href="content_es-mx_en-us.xml" lang="es-mx" altlang="en-us">
      <resources />
    </content>
    <content version="3" href="content_en-us.xml" lang="en-us">
      <resources>
        <resource type="image/svg" href="girlwateringtomatoes2.svg" />
        <resource type="audio/ogg" href="Audio/115988A_Sound1.ogg" />
        <resource type="audio/mp4" href="Audio/115988A_Sound1.m4a" />  
      </resources>
    </content>
  </contents>
  <references />
  <brailleEncodings />
</metadata>

输出：

<metadata Item="1234" version="5" packageVersion="5" xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2">
  <contents>
    <content version="0" href="content_es-mx_en-us.xml" lang="es-mx" altlang="en-us">
      <resources />
    </content>
    <content version="3" href="content_en-us.xml" lang="en-us">
      <resources>
        <resource type="image/svg" href="girlwateringtomatoes2.svg" /> 
      </resources>
    </content>
  </contents>
  <references />
  <brailleEncodings />
</metadata>

这是我试过但没有用的查询。

;WITH XMLNAMESPACES ('http://www.imsglobal.org/xsd/imsqti_v2p2' AS NS)
Update dbo.TableX 
SET [XML].modify('delete /NS:metadata/NS:contents/NS:content[2]/resources/resource[@type != "image/svg"]')

谢谢！

Answer 1

像这样尝试，这是一个命名空间问题...

declare @x table(myXML xml);
insert into @x values(
'<metadata Item="1234" version="5" packageVersion="5" xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2">
  <contents>
    <content version="0" href="content_es-mx_en-us.xml" lang="es-mx" altlang="en-us">
      <resources />
    </content>
    <content version="3" href="content_en-us.xml" lang="en-us">
      <resources>
        <resource type="image/svg" href="girlwateringtomatoes2.svg" />
        <resource type="audio/ogg" href="Audio/115988A_Sound1.ogg" />
        <resource type="audio/mp4" href="Audio/115988A_Sound1.m4a" />  
      </resources>
    </content>
  </contents>
  <references />
  <brailleEncodings />
</metadata>');

;WITH XMLNAMESPACES (DEFAULT 'http://www.imsglobal.org/xsd/imsqti_v2p2')
Update @x 
SET [myXML].modify('delete /metadata/contents/content[2]/resources/resource[@type != "image/svg"]')

SELECT * FROM @x;

Answer 2

如果你想删除所有有 type 的东西，比如 audio 你可以使用 contains:

;WITH XMLNAMESPACES ('http://www.imsglobal.org/xsd/imsqti_v2p2' AS NS)
Update TableX 
SET [XML].modify('delete /NS:metadata/NS:contents/NS:content[2]/NS:resources/NS:resource[contains(@type, "audio")]');

LiveDemo

输出：

<metadata xmlns="http://www.imsglobal.org/xsd/imsqti_v2p2" Item="1234" version="5" packageVersion="5">
   <contents>
      <content version="0" href="content_es-mx_en-us.xml" lang="es-mx" altlang="en-us">
         <resources />
      </content>
      <content version="3" href="content_en-us.xml" lang="en-us">
         <resources>
            <resource type="image/svg" href="girlwateringtomatoes2.svg" />
         </resources>
      </content>
   </contents>
   <references />
   <brailleEncodings />
</metadata>

或者在 XML 文档中的任意位置：

;WITH XMLNAMESPACES (DEFAULT 'http://www.imsglobal.org/xsd/imsqti_v2p2' )
Update TableX 
SET [XML].modify('delete //resources/resource[contains(@type, "audio")]');

LiveDemo2

在 SQL Server 中删除 XML 个匹配属性条件的节点

Remove XML Nodes for matching attribute condition in SQLServer

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