Sql語句查詢XML - 小結

--兩種方式查詢
DECLARE @varXML    XML,
        @varXML1   XML,
        @varXML2   XML

        
--1、xml數據源為屬性方式
SET @varXML = '<PARAM>
                 <Row FID = "1" FName = "張三" />
                 <Row FID = "2" FName = "李四" />
                 <Row FID = "3" FName = "王五" />
               </PARAM>'
                       
Select  T.C.value('@FID','INT')           AS FID,
        T.C.value('@FName','VARCHAR(20)') AS FName
From    @varXML.nodes('/PARAM/Row') T(C)

--2、xml數據源為標簽方式
SET @varXML1 = '<PARAM>
                 <Row><FID>1</FID><FName>張三</FName></Row>
                 <Row><FID>2</FID><FName>李四</FName></Row>
                 <Row><FID>3</FID><FName>王五</FName></Row>
               </PARAM>'
 
Select  T.C.value('(FID)[1]','INT')           AS FID,
        T.C.value('(FName)[1]','VARCHAR(20)') AS FName
From    @varXML1.nodes('/PARAM/Row') T(C)      

--3、xml數據源為屬性方式(多級嵌套)
SET @varXML2 = '<root>
                  <hosptail hospCode = "1" hospName = "測試醫院" >
                    <dept deptCode = "2" deptName = "內科" >
                      <doctor docCode = "3" docName = "王五" ></doctor>
                    </dept>
                  </hosptail>
                </root>'

Select T.C.value('(/root/hosptail/@hospCode)[1]','INT') AS FID,
       T.C.value('(/root/hosptail/@hospName)[1]','VARCHAR(20)') AS FName,
       T.C.value('(/root/hosptail/dept/@deptCode)[1]','INT') AS FID,
       T.C.value('(/root/hosptail/dept/@deptName)[1]','VARCHAR(20)') AS FName,
       T.C.value('(/root/hosptail/dept/doctor/@docCode)[1]','INT') AS FID,
       T.C.value('(/root/hosptail/dept/doctor/@docName)[1]','VARCHAR(20)') AS FName
From   @varXML2.nodes('/root') T(C)

 

應用場景：對外提供的WebService，別人訪問接口后，傳入XML參數，直接將XML當做存儲過程的參數，在存儲過程中查詢、游標等解析處理。

 

當入參同一個參數 有多個時，

--入參中 同一個參數有多個的情況，如下<detailId>LYTSA0000942|2</detailId> <detailId>LYTSA0000942|1</detailId>

declare @xmlStr XML 

set @xmlStr = '<root><medicalCardNumber>001000030044374</medicalCardNumber><outTradeNo>ZJZF_DZSYCSFYBJY_10391149</outTradeNo><amount>0.00</amount>
                             <payTime>2020-04-17 08:50:01</payTime><payType>WeChatPay</payType><balancePayment>0.07</balancePayment><hospitalId>0534_0115</hospitalId>
                             <detailId>LYTSA0000942|2</detailId><detailId>LYTSA0000942|1</detailId>
                       </root>'

--通過指定(detailId)[1]  或  (detailId)[2]  來確定取哪個 參數
Select  T.C.value('(medicalCardNumber)[1]','varchar(1024)')  AS FID,
        T.C.value('(outTradeNo)[1]','VARCHAR(1024)')         AS FName,
        T.C.value('(detailId)[1]','varchar(1024)')           AS detailId1,
        T.C.value('(detailId)[2]','varchar(1024)')           AS detailId2
From    @xmlStr.nodes('/root') T(C)