在 SQL 服务器中用冒号解析 XML 值

Question

我需要帮助来解析 SQL 服务器中的 XML。我需要获取 "d1p1:Val2" 值和 "d2p1:string".

值的串联

<FirstData xmlns:i="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:d1p1="http://XXXXXX" xmlns="http://YYYYYY" i:type="d1p1:StaticInfo">
<Timestamp>0</Timestamp>
<ActionResult i:nil="true" />
<d1p1:Val1 xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:string>1</d2p1:string>
<d2p1:string>2</d2p1:string>
<d2p1:string>3</d2p1:string>
<d2p1:string>4</d2p1:string>
</d1p1:Val1>
<d1p1:Val2>false</d1p1:Val2>
</FirstData>

Answer 1

尝试这样的事情（我自己无法测试）：

SELECT Instructions.query('
     declare namespace d1p1="http://XXXXXX";
     declare namespace d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays";
        concat(//d1p1:Val2, " ", //d2p1:string[1]);
    ')

我想你只需要详细说明一下

Answer 2

你的问题不是很清楚，但是这可能对你有帮助：

DECLARE @xml XML=
N'<FirstData xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:d1p1="http://XXXXXX" xmlns="http://YYYYYY" i:type="d1p1:StaticInfo">
  <Timestamp>0</Timestamp>
  <ActionResult i:nil="true" />
  <d1p1:Val1 xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
    <d2p1:string>1</d2p1:string>
    <d2p1:string>2</d2p1:string>
    <d2p1:string>3</d2p1:string>
    <d2p1:string>4</d2p1:string>
  </d1p1:Val1>
  <d1p1:Val2>false</d1p1:Val2>
</FirstData>';

WITH XMLNAMESPACES(DEFAULT 'http://YYYYYY'
                          ,'http://XXXXXX' AS d1p1
                          ,'http://schemas.microsoft.com/2003/10/Serialization/Arrays' AS d2p1)
SELECT @xml.value(N'(/FirstData/d1p1:Val2/text())[1]','bit') AS D1P1_Val2
      ,@xml.query(N'data(/FirstData/d1p1:Val1/d2p1:string/text())').value(N'text()[1]',N'nvarchar(max)') AS AllStrings;

结果

D1P1_Val2   AllStrings
0           1 2 3 4

这是 - 不推荐 - 最小查询：

SELECT @xml.value(N'(//*:Val2)[1]','bit') AS D1P1_Val2
      ,@xml.query(N'data(//*:string)').value(N'.',N'nvarchar(max)') AS AllStrings;

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