如何从具有相同名称的多个 XML 节点返回行？

Question

以下XML在节点“attachDocument”下有多个节点。 在 SQL 查询下面只返回来自“attachDocument”的第一个节点的行，而不是第二个节点......

有人可以帮助从“attachDocument”的两个节点返回行。

提前致谢...

XML...

set @sqlxml = N'<response xmlns="http://xyz.in/twa/cmm/decl/v2">
<identification>88762431</identification>
<type>RESPONSE</type>
<submitter><identifier>40134916C</identifier></submitter>
<functionalReference>TSW07389555IM1</functionalReference>
<transactionType>24</transactionType>
<attachDocument>
    <category>AAA</category>
    <mimeCode>application/pdf</mimeCode>
    <URI>16f15574-5d5a-4e83-b9ac-2151f10cf2eb</URI>
    <filename>XYZ_B2021_199.pdf</filename>
</attachDocument>
<attachDocument>
    <category>AAB</category>
    <mimeCode>text/plain</mimeCode>
    <URI>1511b476-a2be-4ae5-a54c-0a5dc14759b2</URI>
    <filename>XYZ_B2021_199_xml.txt</filename>
</attachDocument>
<additionalInformationICN><text>Please refer to attached XYZ for Directions</text></additionalInformationICN>
<issueDate>20210331113355</issueDate>
<overallDeclaration>
    <identification>88762431</identification>
    <functionalReference>TSW07389555IM1</functionalReference>
    <submitter>
        <identifier>40134916C</identifier>
    </submitter>
    <responsibleGovernmentAgency>XYZ</responsibleGovernmentAgency>
</overallDeclaration>
<status>
    <agency>XYZ</agency>
    <effectiveDate>20210331113355</effectiveDate>
    <name>B04</name>
    <releaseDate>20210331113355</releaseDate>
</status>
</response>'


SQL Query...
;WITH XMLNAMESPACES ('http://xyz.in/twa/cmm/decl/v2' AS ur)
SELECT
response.value('(//ur:attachDocument/ur:category)[1]','varchar(50)') as Category,
response.value('(//ur:attachDocument/ur:mimeCode)[1]','varchar(50)') as MimeCode,
response.value('(//ur:attachDocument/ur:URI)[1]','varchar(50)') as URI,
response.value('(//ur:attachDocument/ur:filename)[1]','varchar(50)') as [FileName],
response.value('(//ur:status/ur:agency)[1]','varchar(100)') as ResponseAgency,
response.value('(//ur:response/ur:issueDate)[1]','varchar(100)') as ResponseIssueDateTime,
response.value('(//ur:response/ur:additionalInformationICN)[1]','varchar(100)') as ResponseClearanceInstructions
FROM @sqlxml.nodes('//ur:response') AS T(response)

Answer 1

请尝试以下解决方案。

值得注意的笔记：

• 默认命名空间的正确声明可以全面简化 XPath 表达式。 默认命名空间不需要前缀。
• 最好不要在 XPath 表达式中使用// 。 它导致遍历整个 XML。 完全合格的路径对性能更好。
• 将 text() 添加到 XML 元素的 XPath 表达式可以提高性能。

SQL

DECLARE @sqlxml XML = 
N'<response xmlns="http://xyz.in/twa/cmm/decl/v2">
    <identification>88762431</identification>
    <type>RESPONSE</type>
    <submitter>
        <identifier>40134916C</identifier>
    </submitter>
    <functionalReference>TSW07389555IM1</functionalReference>
    <transactionType>24</transactionType>
    <attachDocument>
        <category>AAA</category>
        <mimeCode>application/pdf</mimeCode>
        <URI>16f15574-5d5a-4e83-b9ac-2151f10cf2eb</URI>
        <filename>XYZ_B2021_199.pdf</filename>
    </attachDocument>
    <attachDocument>
        <category>AAB</category>
        <mimeCode>text/plain</mimeCode>
        <URI>1511b476-a2be-4ae5-a54c-0a5dc14759b2</URI>
        <filename>XYZ_B2021_199_xml.txt</filename>
    </attachDocument>
    <additionalInformationICN>
        <text>Please refer to attached XYZ for Directions</text>
    </additionalInformationICN>
    <issueDate>20210331113355</issueDate>
    <overallDeclaration>
        <identification>88762431</identification>
        <functionalReference>TSW07389555IM1</functionalReference>
        <submitter>
            <identifier>40134916C</identifier>
        </submitter>
        <responsibleGovernmentAgency>XYZ</responsibleGovernmentAgency>
    </overallDeclaration>
    <status>
        <agency>XYZ</agency>
        <effectiveDate>20210331113355</effectiveDate>
        <name>B04</name>
        <releaseDate>20210331113355</releaseDate>
    </status>
</response>'


;WITH XMLNAMESPACES (DEFAULT 'http://xyz.in/twa/cmm/decl/v2')
SELECT response.value('(category/text())[1]','varchar(50)') as Category,
    response.value('(mimeCode/text())[1]','varchar(50)') as MimeCode,
    response.value('(URI/text())[1]','varchar(50)') as URI,
    response.value('(filename/text())[1]','varchar(50)') as [FileName],
    response.value('(/response/status/agency/text())[1]','varchar(100)') as ResponseAgency,
    response.value('(/response/issueDate/text())[1]','varchar(100)') as ResponseIssueDateTime,
    response.value('(/response/additionalInformationICN/text/text())[1]','varchar(100)') as ResponseClearanceInstructions
FROM @sqlxml.nodes('/response/attachDocument') AS T(response);

Output

+----------+-----------------+--------------------------------------+-----------------------+----------------+-----------------------+---------------------------------------------+
| Category |    MimeCode     |                 URI                  |       FileName        | ResponseAgency | ResponseIssueDateTime |        ResponseClearanceInstructions        |
+----------+-----------------+--------------------------------------+-----------------------+----------------+-----------------------+---------------------------------------------+
| AAA      | application/pdf | 16f15574-5d5a-4e83-b9ac-2151f10cf2eb | XYZ_B2021_199.pdf     | XYZ            |        20210331113355 | Please refer to attached XYZ for Directions |
| AAB      | text/plain      | 1511b476-a2be-4ae5-a54c-0a5dc14759b2 | XYZ_B2021_199_xml.txt | XYZ            |        20210331113355 | Please refer to attached XYZ for Directions |
+----------+-----------------+--------------------------------------+-----------------------+----------------+-----------------------+---------------------------------------------+