XML列中的多个值

Question

我试图弄清楚如何从表中的XML字段的多个节点获取多个值（实际上它的XML存储为文本）。

我见过几种方法，涉及将XML声明为变量并将其用作表格，但我不知道这对我有何用处。 How to Extract data from xml column in sql 2008

我目前正在使用.value来获取某些字段，但我不知道如何使其工作，因为可能有多个 LX01_AssignedNumber ，我需要获取所有 ProcedureModifier < / strong>来自每个人。

SELECT  CAST(xmldata as xml).value('declare namespace ns1="http://schemas.microsoft.com/BizTalk/EDI/EDIFACT/2006/EnrichedMessageXML";declare namespace ns0="http://schemas.microsoft.com/BizTalk/EDI/X12/2006";
(/ns1:X12EnrichedMessage/TransactionSet/ns0:X12_00501_837_P/ns0:TS837_2000A_Loop/ns0:TS837_2000B_Loop/ns0:TS837_2300_Loop/ns0:TS837_2400_Loop/ns0:SV1_ProfessionalService/ns0:C003_CompositeMedicalProcedureIdentifier/C00303_ProcedureModifier) [1]', 'varchar(20)') AS RendAttendNPI 
FROM EDI_DATA

如何从每条记录中获取所有行号和所有过程修饰符？

XML：

<ns1:X12EnrichedMessage xmlns:ns1="http://schemas.microsoft.com/BizTalk/EDI/EDIFACT/2006/EnrichedMessageXML">
...
    <TransactionSet>
        <!-- ProcessLogID=PLG0005169955  ;ProcessLogDetailID=PLG0005173285  ;EnvID=1;RetryCount=1 -->
        <ns0:X12_00501_837_P xmlns:ns0="http://schemas.microsoft.com/BizTalk/EDI/X12/2006">
            <ns0:TS837_2000A_Loop xmlns:ns0="http://schemas.microsoft.com/BizTalk/EDI/X12/2006">
                <ns0:TS837_2000B_Loop xmlns:ns0="http://schemas.microsoft.com/BizTalk/EDI/X12/2006">
                    <ns0:TS837_2300_Loop xmlns:ns0="http://schemas.microsoft.com/BizTalk/EDI/X12/2006">
                        <ns0:TS837_2400_Loop>
                            <ns0:LX_ServiceLineNumber>
                                <LX01_AssignedNumber>1</LX01_AssignedNumber>
                            </ns0:LX_ServiceLineNumber>
                            <ns0:SV1_ProfessionalService>
                                <ns0:C003_CompositeMedicalProcedureIdentifier>
                                    <C00301_ProductorServiceIDQualifier>HC</C00301_ProductorServiceIDQualifier>
                                    <C00302_ProcedureCode>26340</C00302_ProcedureCode>
                                    <C00303_ProcedureModifier>AG</C00303_ProcedureModifier>
                                    <C00304_ProcedureModifier>58</C00304_ProcedureModifier>
                                    <C00305_ProcedureModifier>51</C00305_ProcedureModifier>
                                    <C00306_ProcedureModifier>XS</C00306_ProcedureModifier>
                                </ns0:C003_CompositeMedicalProcedureIdentifier>
                                <SV102_LineItemChargeAmount>8918</SV102_LineItemChargeAmount>
                                <SV103_UnitorBasisforMeasurementCode>UN</SV103_UnitorBasisforMeasurementCode>
                                <SV104_ServiceUnitCount>13</SV104_ServiceUnitCount>
                                <ns0:C004_CompositeDiagnosisCodePointer>
                                    <C00401_DiagnosisCodePointer>1</C00401_DiagnosisCodePointer>
                                    <C00402_DiagnosisCodePointer>2</C00402_DiagnosisCodePointer>
                                </ns0:C004_CompositeDiagnosisCodePointer>
                            </ns0:SV1_ProfessionalService>
                            <ns0:DTP_SubLoop_2>
                                <ns0:DTP_Date_ServiceDate>
                                    <DTP01_DateTimeQualifier>472</DTP01_DateTimeQualifier>
                                    <DTP02_DateTimePeriodFormatQualifier>D8</DTP02_DateTimePeriodFormatQualifier>
                                    <DTP03_ServiceDate>20160104</DTP03_ServiceDate>
                                </ns0:DTP_Date_ServiceDate>
                            </ns0:DTP_SubLoop_2>
                            <ns0:REF_SubLoop_7>
                                <ns0:REF_LineItemControlNumber>
                                    <REF01_ReferenceIdentificationQualifier>6R</REF01_ReferenceIdentificationQualifier>
                                    <REF02_LineItemControlNumber>11453481</REF02_LineItemControlNumber>
                                </ns0:REF_LineItemControlNumber>
                            </ns0:REF_SubLoop_7>
                        </ns0:TS837_2400_Loop>
                        <ns0:TS837_2400_Loop>
                            <ns0:LX_ServiceLineNumber>
                                <LX01_AssignedNumber>2</LX01_AssignedNumber>
                            </ns0:LX_ServiceLineNumber>
                            <ns0:SV1_ProfessionalService>
                                <ns0:C003_CompositeMedicalProcedureIdentifier>
                                    <C00301_ProductorServiceIDQualifier>HC</C00301_ProductorServiceIDQualifier>
                                    <C00302_ProcedureCode>20680</C00302_ProcedureCode>
                                    <C00303_ProcedureModifier>58</C00303_ProcedureModifier>
                                </ns0:C003_CompositeMedicalProcedureIdentifier>
                                <SV102_LineItemChargeAmount>1277</SV102_LineItemChargeAmount>
                                <SV103_UnitorBasisforMeasurementCode>UN</SV103_UnitorBasisforMeasurementCode>
                                <SV104_ServiceUnitCount>1</SV104_ServiceUnitCount>
                                <ns0:C004_CompositeDiagnosisCodePointer>
                                    <C00401_DiagnosisCodePointer>3</C00401_DiagnosisCodePointer>
                                </ns0:C004_CompositeDiagnosisCodePointer>
                            </ns0:SV1_ProfessionalService>
                        </ns0:TS837_2400_Loop>
                    </ns0:TS837_2300_Loop>
                </ns0:TS837_2000B_Loop>
            </ns0:TS837_2000A_Loop>
        </ns0:X12_00501_837_P>
    </TransactionSet>
</ns1:X12EnrichedMessage>

Answer 1

查看SQL Server CROSS APPLY，您可以使用它将单个XML数据分成多行，例如：

;WITH XMLNAMESPACES ('http://schemas.microsoft.com/BizTalk/EDI/X12/2006' as ns0
                     ,'http://schemas.microsoft.com/BizTalk/EDI/EDIFACT/2006/EnrichedMessageXML' as ns1)

SELECT 
    TS837_2400_Loop.value('(.//LX01_AssignedNumber)[1]', 'int') 'line_number'
    ,C00303_ProcedureModifier.value('.', 'varchar(100)') 'procedure_modifier'
FROM EDI_DATA
    CROSS APPLY (select CONVERT(XML, xmldata)) as P(X)
    CROSS APPLY X.nodes('.//ns0:TS837_2400_Loop') AS Q(TS837_2400_Loop)
    CROSS APPLY TS837_2400_Loop.nodes('.//C00303_ProcedureModifier') AS R(C00303_ProcedureModifier)

<强> sqlfiddle demo

输出

| line_number | procedure_modifier |
|-------------|--------------------|
|           1 |                 AG |
|           2 |                 58 |