如何在从 oracle 中提取期间为用户创建唯一 ID xml

Question

我的 oracle 数据库中有 xml 数据，我的 oracle 数据库中的特定 appID 有不同的申请人。请注意，appID 是 oracle table 中的一个字段，而申请人在 xml 数据中（我在这个 xml 中有多个申请人）我想为申请人创建一个唯一的 ID . 在示例数据中，有 3 个申请人。如何在我的 select 语句中创建唯一 ID。

WITH t( xml ) AS
    (
    SELECT XMLType('<loanApplication xmlns="http://www.abcdef.com/Schema/FCX/1" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
     <applicantGroup>
         <applicantGroupTypeDd>0</applicantGroupTypeDd>
        <applicant>
          <asset>
            <assetDescription>neweg</assetDescription>
            <assetTypeDd>1</assetTypeDd>
            <assetValue>1500.0</assetValue>
          </asset>
          <asset>
            <assetDescription>RayM</assetDescription>
            <assetTypeDd>6</assetTypeDd>
            <assetValue>60000</assetValue>
          </asset>
          <asset>
            <assetDescription>TDC</assetDescription>
            <assetTypeDd>8</assetTypeDd>
            <assetValue>100</assetValue>
          </asset>
          <asset>
            <assetDescription>2007 Hyundai</assetDescription>
            <assetTypeDd>4</assetTypeDd>
            <assetValue>2500</assetValue>
          </asset>
       </applicant>
      </applicantGroup>
      <applicantGroup>
        <applicantGroupTypeDd>1</applicantGroupTypeDd>
        <applicant>
          <asset>
            <assetDescription>neweg</assetDescription>
            <assetTypeDd>2</assetTypeDd>
            <assetValue>15000.0</assetValue>
          </asset>
          <asset>
            <assetDescription>Bay</assetDescription>
            <assetTypeDd>6</assetTypeDd>
            <assetValue>60000</assetValue>
          </asset>
          <asset>
            <assetDescription>TDC</assetDescription>
            <assetTypeDd>9</assetTypeDd>
            <assetValue>100</assetValue>
          </asset>
          <asset>
            <assetDescription>2007 car</assetDescription>
            <assetTypeDd>3</assetTypeDd>
            <assetValue>2500</assetValue>
          </asset>
       </applicant>
      </applicantGroup>
      <applicantGroup>
        <applicantGroupTypeDd>3</applicantGroupTypeDd>
        <applicant>
          <asset>
            <assetDescription>neweg</assetDescription>
            <assetTypeDd>6</assetTypeDd>
            <assetValue>100.0</assetValue>
          </asset>
          <asset>
            <assetDescription>RayM</assetDescription>
            <assetTypeDd>8</assetTypeDd>
            <assetValue>60000</assetValue>
          </asset>
          <asset>
            <assetDescription>TDC</assetDescription>
            <assetTypeDd>7</assetTypeDd>
            <assetValue>100</assetValue>
          </asset>
          <asset>
            <assetDescription>2007 Hyundai</assetDescription>
            <assetTypeDd>5</assetTypeDd>
            <assetValue>2500</assetValue>
          </asset>
       </applicant>
      </applicantGroup>
        </loanApplication>')
     FROM dual
    )
    SELECT JSON_OBJECT (        
            KEY 'Assets' value y.Assets
            ) assets
    FROM t,
    XMLTABLE(XMLNAMESPACES(DEFAULT 'http://www.abcdef.com/Schema/FCX/1'), '/loanApplication/applicantGroup/applicant/asset'
          PASSING xml
          COLUMNS
                Assets INT PATH 'assetValue') y

结果，我需要

AppId	applicantId	assetTypeDd
1	1	[1,6,8,4]
1	2	[1,2,6,9,3]
1	3	[3,6,8,7,5]

谢谢

Answer 1

考虑 XPath 的 ancestor 轴并计算 pf preceding-sibling 因为它显示一个申请人节点属于每个申请人组：

WITH t( xml_data ) AS
    (
    SELECT XMLType('<loanApplication xmlns="http://www.abcdef.com/Schema/FCX/1" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
     <applicantGroup>
         <applicantGroupTypeDd>0</applicantGroupTypeDd>
        <applicant>
          <asset>
            <assetDescription>neweg</assetDescription>
            <assetTypeDd>1</assetTypeDd>
            <assetValue>1500.0</assetValue>
          </asset>
          <asset>
            <assetDescription>RayM</assetDescription>
            <assetTypeDd>6</assetTypeDd>
            <assetValue>60000</assetValue>
          </asset>
          <asset>
            <assetDescription>TDC</assetDescription>
            <assetTypeDd>8</assetTypeDd>
            <assetValue>100</assetValue>
          </asset>
          <asset>
            <assetDescription>2007 Hyundai</assetDescription>
            <assetTypeDd>4</assetTypeDd>
            <assetValue>2500</assetValue>
          </asset>
       </applicant>
      </applicantGroup>
      <applicantGroup>
        <applicantGroupTypeDd>1</applicantGroupTypeDd>
        <applicant>
          <asset>
            <assetDescription>neweg</assetDescription>
            <assetTypeDd>2</assetTypeDd>
            <assetValue>15000.0</assetValue>
          </asset>
          <asset>
            <assetDescription>Bay</assetDescription>
            <assetTypeDd>6</assetTypeDd>
            <assetValue>60000</assetValue>
          </asset>
          <asset>
            <assetDescription>TDC</assetDescription>
            <assetTypeDd>9</assetTypeDd>
            <assetValue>100</assetValue>
          </asset>
          <asset>
            <assetDescription>2007 car</assetDescription>
            <assetTypeDd>3</assetTypeDd>
            <assetValue>2500</assetValue>
          </asset>
       </applicant>
      </applicantGroup>
      <applicantGroup>
        <applicantGroupTypeDd>3</applicantGroupTypeDd>
        <applicant>
          <asset>
            <assetDescription>neweg</assetDescription>
            <assetTypeDd>6</assetTypeDd>
            <assetValue>100.0</assetValue>
          </asset>
          <asset>
            <assetDescription>RayM</assetDescription>
            <assetTypeDd>8</assetTypeDd>
            <assetValue>60000</assetValue>
          </asset>
          <asset>
            <assetDescription>TDC</assetDescription>
            <assetTypeDd>7</assetTypeDd>
            <assetValue>100</assetValue>
          </asset>
          <asset>
            <assetDescription>2007 Hyundai</assetDescription>
            <assetTypeDd>5</assetTypeDd>
            <assetValue>2500</assetValue>
          </asset>
       </applicant>
      </applicantGroup>
        </loanApplication>')
     FROM dual
    )

SELECT y.ApplicantId AS "applicantId",   
       LISTAGG(y.AssetTypeDd, ',') AS "assetTypeDd",
       LISTAGG(y.Assets, ',') AS "assets"
FROM t,
     XMLTABLE(
          XMLNAMESPACES('http://www.abcdef.com/Schema/FCX/1' AS "d",
                        DEFAULT 'http://www.abcdef.com/Schema/FCX/1'),
          '//d:asset'
          PASSING xml_data
          COLUMNS
                ApplicantId INT PATH 'count(ancestor::applicantGroup/preceding-sibling::*)+1',
                AssetTypeDd INT PATH 'assetTypeDd',
                Assets INT PATH 'assetValue'
    ) y
GROUP BY y.ApplicantId
ORDER BY y.ApplicantId

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如何在从 oracle 中提取期间为用户创建唯一 ID xml

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