Question

我找到了一些类似的例子，但我无法让它发挥作用。

我已将XML数据插入到表中，需要一个示例来查询Param Name和Values，其中Module Name =“P2”

XML数据看起来像这样。

<TrendProject>
    <Site CncAddress="81" TuaString="T/IQ3 - 00:10:70:00:8B:26/TCP,,,10.17.250.105,10081///13/21/">
        <Lan IsLocal="True" LanNumber="13">
            <Device DeviceNumber="21" VersionString="IQ3xcite128 Iss3.06 Jan 30 2014">
                <DeviceOverview DeviceType="q" MajorVersion="3" MinorVersion="0" HexEncoded="711B1B1B41333036" Revision="6"></DeviceOverview>
                <Module Name="P1" SubTypeNumber="-1">
                    <Param Name="$" Type="2" Value="Udetemperatur" />
                    <Param Name="S" Type="1" Value="0.0" >
                        <ConEndPoint>S20V</ConEndPoint>
                    </Param>
                    <Param Name="P" Type="6" Value="4" Enum="5 Minutes" />
                    <Param Name="C" Type="6" Value="28732" />
                    <Param Name="T" Type="7" Value="2014-05-30T09:00:00" />
                    <Param Name="B1" Type="300" >
                        <Param Name="V" Type="1" Value="0.0" />
                        <Param Name="Y" Type="6" Value="2" />
                        <Param Name="S" Type="108" Value="0" />
                        <Param Name="E" Type="6" Value="28732" />
                        <Param Name="T" Type="7" Value="2014-05-30T09:00:00" />
                        <Param Name="O" Type="6" Value="0" />
                    </Param>
                </Module>
                <Module Name="P2" SubTypeNumber="-1">
                    <Param Name="$" Type="2" Value="BL01 MV 10.X.2 Varme Funktion" />
                    <Param Name="S" Type="1" Value="100.0" >
                        <ConEndPoint>S52V</ConEndPoint>
                    </Param>
                    <Param Name="P" Type="6" Value="4" Enum="5 Minutes" />
                    <Param Name="C" Type="6" Value="57617" />
                    <Param Name="T" Type="7" Value="2014-05-30T09:00:00" />
                    <Param Name="B1" Type="300" >
                        <Param Name="V" Type="1" Value="100.0" />
                        <Param Name="Y" Type="6" Value="2" />
                        <Param Name="S" Type="108" Value="0" />
                        <Param Name="E" Type="6" Value="57617" />
                        <Param Name="T" Type="7" Value="2014-05-30T09:00:00" />
                        <Param Name="O" Type="6" Value="0" />
                    </Param>
                </Module>
                <Module Name="P3" SubTypeNumber="-1">
                    <Param Name="$" Type="2" Value="BL01 TF10 Fremlob" />
                    <Param Name="S" Type="1" Value="21.0" >
                        <ConEndPoint>S1V</ConEndPoint>
                    </Param>
                    <Param Name="P" Type="6" Value="4" Enum="5 Minutes" />
                    <Param Name="C" Type="6" Value="57617" />
                    <Param Name="T" Type="7" Value="2014-05-30T09:00:00" />
                    <Param Name="B1" Type="300" >
                        <Param Name="V" Type="1" Value="21.0" />
                        <Param Name="Y" Type="6" Value="2" />
                        <Param Name="S" Type="108" Value="64" />
                        <Param Name="E" Type="6" Value="57617" />
                        <Param Name="T" Type="7" Value="2014-05-30T09:00:00" />
                        <Param Name="O" Type="6" Value="0" />
                    </Param>
                </Module>
            </Device>
        </Lan>
    </Site>
</TrendProject>

我试图以很多方式查询XML并陷入困境。这只返回所有模块的所有属性。

DECLARE @myTable TABLE(plotXML XML)

INSERT INTO @myTable(plotXML) Values ((SELECT PlotsSettings From PlotsXMLdata WHERE iqID = 1))

SELECT * FROM @myTable

IF OBJECT_ID('tempdb..#Temp') IS NOT NULL

DROP TABLE #Temp

SELECT TP2.Param.value('(@Name)', 'nvarchar(4)') as PlotParamName, TP2.Param.value('(@Value)', 'nvarchar(50)') as PlotParamValue, TP.Modules.value('(.)[1]', 'nvarchar(50)') as PlotModuleName INTO #Temp
FROM @myTable
CROSS APPLY
plotXML.nodes('/TrendProject/Site/Lan/Device/Module/@Name') as TP(Modules)
CROSS APPLY
plotXML.nodes('(/TrendProject/Site/Lan/Device/Module/Param)') as TP2(Param)

SELECT * FROM #Temp

Answer 1

如果您的XML位于变量@xml

中

 select 
      x.n.value('./@Name','varchar(50)') , 
      x.n.value('./@Value','varchar(50)') 
 from  @xml.nodes('//Module[@Name="P2"]/Param') x(n)

或从表格

 select 
      x.n.value('./@Name','varchar(50)') , 
      x.n.value('./@Value','varchar(50)') 
 from yourtable
cross apply 
 xmlField.nodes('//Module[@Name="P2"]/Param') x(n)

SQL SERVER从XML数据查询属性值

1 个答案: