Question

此代码的问题在于每个组中并不总是有CEEBCode。它找到的第一个ceebcode实际上在第二组中，并与第一组中的其他元素匹配。

当ceeb代码不存在时，是否仍然将组保持在一起？

select 
UIN,
docXML.value('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool/CEEBCode/text())[1]' 
    ,'varchar(6)'
    ) as ceeb1,
docxml.value
    ('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool/IsGrad/text())[1]'
    ,'varchar(5)'
    ) as IsGradAns1,
docxml.value
    ('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool/Country/text())[1]' 
    ,'varchar(25)'
    ) as Country1,
docXML.value('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool/CEEBCode/text())[2]' 
    ,'varchar(6)'
    ) as ceeb2,
docxml.value
    ('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool/IsGrad/text())[2]'
    ,'varchar(5)'
    ) as IsGradAns2,
docxml.value
    ('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool/Country/text())[2]' 
    ,'varchar(25)'
    ) as Country2
from tblDocument
where docxml is not null

示例XML：

<SelfReportedTranscript>
  <HighSchools>
    <SelfReportedHighSchool>
      <Name>Ramay Jr High School</Name>
      <City>Fayetteville</City>
      <Country>United States of America</Country>
      <StateProvince>Arkansas</StateProvince>
      <IsGrad>false</IsGrad>
      <HighSchoolType>Domestic</HighSchoolType>
    </SelfReportedHighSchool>
    <SelfReportedHighSchool>
      <Name>Fayetteville Sr High Sch</Name>
      <CEEBCode>040770</CEEBCode>
      <City>Fayetteville</City>
      <Country>US</Country>
      <StateProvince>AR</StateProvince>
      <IsGrad>true</IsGrad>
      <HighSchoolType>Domestic</HighSchoolType>
    </SelfReportedHighSchool>
  </HighSchools>
</SelfReportedTranscript>

这适用于SQL Server 2005 SP3

Answer 1

试试这个。已将[1]和[2]添加到SelfReportedHighSchool代码中，因为您可以从中获取“行”。还需要将最终[2]更改为[1]。

select 
UIN,
docXML.value('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool[1]/CEEBCode/text())[1]' 
    ,'varchar(6)'
    ) as ceeb1,
docxml.value
    ('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool[1]/IsGrad/text())[1]'
    ,'varchar(5)'
    ) as IsGradAns1,
docxml.value
    ('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool[1]/Country/text())[1]' 
    ,'varchar(25)'
    ) as Country1,
docXML.value('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool[2]/CEEBCode/text())[1]' 
    ,'varchar(6)'
    ) as ceeb2,
docxml.value
    ('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool[2]/IsGrad/text())[1]'
    ,'varchar(5)'
    ) as IsGradAns2,
docxml.value
    ('
    (/SelfReportedTranscript/HighSchools/SelfReportedHighSchool[2]/Country/text())[1]' 
    ,'varchar(25)'
    ) as Country2
from tblDocument
where docxml is not null

在存在不均匀元素时查询XML

1 个答案: