从 table 中查询 XML 数据 - 使用模式集合？

Question

我需要重写一个旧的 DTS/SQL2000 进程，该进程将存储为 varchar 的 xml 数据从 table 导出到 xml 文件，仅供读取返回并填充一些 table，例如 contract/customer/business activity。我想直接查询 xml 列，但根据我使用的方法总是得到 Blank 或 NULL，我真的很难过。我基于另一个答案的最新快速版本是....

 SELECT
    XML_MESSAGE.value('(Transaction_Id/text())[1]','varchar(100)') AS TransactionID
FROM dbo.XML_REPOSITORY t
OUTER APPLY t.XML_MESSAGE.nodes('Contract_Interface') AS bm(XMLData)
--OUTER APPLY bm.XML_MESSAGE.nodes('food') AS f(XMLData)

但是，我已经基于旧的 xsd 文件为每个集合（contract/customer 等）创建了一个架构集合，所以真正的问题是我如何使用它来提取相关数据？ xml 的缩减版本如下..

<Contract_Interface xmlns="http://company.com/backoffice/types/common" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://comapny.com/backoffice/types/common http://dataplace/xmlschemas/Policy_Transaction_Interface_1_1_9.xsd">
  <Transaction_Id>48244272268</Transaction_Id>
  <Source_System_Cd>SystemName</Source_System_Cd>
  <Business_Activity>
    <Contract_Id>169929</Contract_Id>
    <Business_Activity_Type_Cd>01</Business_Activity_Type_Cd>
    <Business_Activity_Type_Desc>New Binder</Business_Activity_Type_Desc>
    <Out_Of_Sequence_Ind>N</Out_Of_Sequence_Ind>
    <Effective_Dt>4/18/2021 12:00:00 AM</Effective_Dt>
    <Expiration_Dt>4/18/2022 12:00:00 AM</Expiration_Dt>
    <Premium_Amt>123678.00</Premium_Amt>
    <Contract>
      <Customer>
        <Customer_Id>45678</Customer_Id>
        <ODS_Customer_Id>6789</ODS_Customer_Id>
        <Insured_Info_Overriden_Cd>N</Insured_Info_Overriden_Cd>
        <Insured_Info_Overriden_Desc>No</Insured_Info_Overriden_Desc>
        <Insured_Nm>Make Money PLC</Insured_Nm>
        <Insured_Address>
          <Address_Line_1>Alex Jones Terrace</Address_Line_1>
          <Address_Line_2 />
          <City_Nm>Houston</City_Nm>
          <State_Cd>TX</State_Cd>
          <State_Desc>Texas</State_Desc>
          <Postal_Cd>77002</Postal_Cd>
          <Country_Cd>US</Country_Cd>
          <Country_Desc>United States</Country_Desc>
        </Insured_Address>
      </Customer>
      <Producer>
        <Producer_Id>33333</Producer_Id>
        <ODS_Producer_Id>1234</ODS_Producer_Id>
        <Producer_No>1234</Producer_No>
        <Producer_Nm>Brokerage Limited</Producer_Nm>
        <Billing_Address_Overridden_Ind>false</Billing_Address_Overridden_Ind>
        <Producer_Billing_Address>
          <Address_Line_1>Suite 1000</Address_Line_1>
          <Address_Line_2>Free Road</Address_Line_2>
          <City_Nm>Hamilton</City_Nm>
          <State_Cd />
          <State_Desc />
          <Postal_Cd>HM11</Postal_Cd>
          <Country_Cd>BM</Country_Cd>
          <Country_Desc>Bermuda</Country_Desc>
        </Producer_Billing_Address>
      </Producer>
    </Contract>
 </Business_Activity>
</Contract_Interface>

Answer 1

正如我提到的，您需要定义您的命名空间。这使用了一个变量，而不是你的 table，但给了你一个叠加的想法：

DECLARE @XML xml = '<Contract_Interface xmlns="http://company.com/backoffice/types/common" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://comapny.com/backoffice/types/common http://dataplace/xmlschemas/Policy_Transaction_Interface_1_1_9.xsd">
  <Transaction_Id>48244272268</Transaction_Id>
  <Source_System_Cd>SystemName</Source_System_Cd>
  <Business_Activity>
    <Contract_Id>169929</Contract_Id>
    <Business_Activity_Type_Cd>01</Business_Activity_Type_Cd>
    <Business_Activity_Type_Desc>New Binder</Business_Activity_Type_Desc>
    <Out_Of_Sequence_Ind>N</Out_Of_Sequence_Ind>
    <Effective_Dt>4/18/2021 12:00:00 AM</Effective_Dt>
    <Expiration_Dt>4/18/2022 12:00:00 AM</Expiration_Dt>
    <Premium_Amt>123678.00</Premium_Amt>
    <Contract>
      <Customer>
        <Customer_Id>45678</Customer_Id>
        <ODS_Customer_Id>6789</ODS_Customer_Id>
        <Insured_Info_Overriden_Cd>N</Insured_Info_Overriden_Cd>
        <Insured_Info_Overriden_Desc>No</Insured_Info_Overriden_Desc>
        <Insured_Nm>Make Money PLC</Insured_Nm>
        <Insured_Address>
          <Address_Line_1>Alex Jones Terrace</Address_Line_1>
          <Address_Line_2 />
          <City_Nm>Houston</City_Nm>
          <State_Cd>TX</State_Cd>
          <State_Desc>Texas</State_Desc>
          <Postal_Cd>77002</Postal_Cd>
          <Country_Cd>US</Country_Cd>
          <Country_Desc>United States</Country_Desc>
        </Insured_Address>
      </Customer>
      <Producer>
        <Producer_Id>33333</Producer_Id>
        <ODS_Producer_Id>1234</ODS_Producer_Id>
        <Producer_No>1234</Producer_No>
        <Producer_Nm>Brokerage Limited</Producer_Nm>
        <Billing_Address_Overridden_Ind>false</Billing_Address_Overridden_Ind>
        <Producer_Billing_Address>
          <Address_Line_1>Suite 1000</Address_Line_1>
          <Address_Line_2>Free Road</Address_Line_2>
          <City_Nm>Hamilton</City_Nm>
          <State_Cd />
          <State_Desc />
          <Postal_Cd>HM11</Postal_Cd>
          <Country_Cd>BM</Country_Cd>
          <Country_Desc>Bermuda</Country_Desc>
        </Producer_Billing_Address>
      </Producer>
    </Contract>
 </Business_Activity>
</Contract_Interface>';

WITH XMLNAMESPACES(DEFAULT 'http://company.com/backoffice/types/common')
SELECT bm.XMLData.value('(Transaction_Id/text())[1]','varchar(100)') AS TransactionID --Should this not be a int or bigint?
FROM @XML.nodes('Contract_Interface') AS bm(XMLData);

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