CROSS APPLY到命名空间,子节点返回重复记录

时间:2016-09-02 13:33:53

标签: sql-server xml sql-server-2008 xpath xml-namespaces

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我有这个xml(为了便于阅读,删除了大部分内容)。我弄错了记录。每个CAS_Number获取错误的化学名称。一个CAS_Number表示一种化学物质。但是在这里,对于相同的CAS_number,我有不同的化学名称。

这是我交叉申请中的问题,但我无法弄清楚。

<ArrayOfCatalogItem xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<CatalogItem Version="1">
   <Msds xmlns="http://3ecompany.com/webservices/catalogitemxml">
     <ProductIdentifiers xmlns="http://3ecompany.com/webservices/catalogitemxml">
      <Identifier>M007628</Identifier>
      <Source>CPN</Source>
      <FirstExportDate xsi:nil="true" />
      <LastExportDate xsi:nil="true" />
      <FlaggedForResend xsi:nil="true" />
    </ProductIdentifiers>
     <Ingredients>
        <ChemicalName>Hexane</ChemicalName>
        <Cas>000110-54-3</Cas>
        <AvgPercent>20.000000</AvgPercent>
      </Ingredients>
      <Ingredients>
        <ChemicalName>2-Propanone</ChemicalName>
        <Cas>000067-64-1</Cas>
        <AvgPercent>20.000000</AvgPercent>
      </Ingredients>
      <Ingredients>
        <ChemicalName>Petroleum gases, liquefied, sweetened</ChemicalName>
        <Cas>068476-86-8</Cas>
      </Ingredients>
  </Msds>
</CatalogItem>
</ArrayOfCatalogItem>

存储过程如下:

DECLARE @XmlTable TABLE (XMLDATA XML)

INSERT INTO @XmlTable(XMLData)
    SELECT CONVERT(XML, BulkColumn) AS BulkColumn 
    FROM OPENROWSET(BULK 'C:\AA.Sample.File.LUS.Pilly-oneCI.xml', SINGLE_BLOB) AS x;

;WITH XMLNAMESPACES ('http://3ecompany.com/webservices/catalogitemxml' as CI)
SELECT 
    --CIVersion = CI.value('@Version', 'int'),
    Identifier = PID.value('(.)\[1\]', 'varchar(9)'),
    Product_Name = MSDSPN.value('(.)\[1\]','varchar(100)'),
    CAS_Number = CAS.value('(.)\[1\]', 'varchar(20)'),
    Chemical_Name = CN.value('(.)\[1\]', 'varchar(100)')

FROM
    @XmlTable
CROSS APPLY
    XMLData.nodes('/ArrayOfCatalogItem/CatalogItem') AS XT(CI)
OUTER APPLY
    CI.nodes('CI:ProductIdentifiers/CI:Identifier') AS XT2(PID)
CROSS APPLY
    CI.nodes('CI:Msds/CI:Ingredients/CI:Cas') AS XT18(CAS)
CROSS APPLY
    CI.nodes('CI:Msds/CI:Ingredients/CI:ChemicalName') AS XT19(CN)

1 个答案:

答案 0 :(得分:3)

试试这个:

;WITH XMLNAMESPACES ('http://3ecompany.com/webservices/catalogitemxml' as CI)
SELECT 
    Identifier = CI.value('(CI:ProductIdentifiers[1]/CI:Identifier)[1]', 'varchar(9)'),
    CAS_Number = Ingred.value('(CI:Cas)[1]', 'varchar(20)'),
    Chemical_Name = Ingred.value('(CI:ChemicalName)[1]', 'varchar(100)')
FROM
    @XmlTable
CROSS APPLY
    XMLData.nodes('/ArrayOfCatalogItem/CatalogItem/CI:Msds') AS XT(CI)
CROSS APPLY
    CI.nodes('CI:Ingredients') AS XT18(Ingred)

我得到每个<Msds>节点的XML片段列表,并从中获取ProductIdentifiers信息。另外,从这个节点,我还获得了<Ingredients>节点的子XML片段列表,并从中获取详细信息。

我的输出如下:

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