如何提取oracle中包含名称空间的XML数据

查询：

试试这个：

select * from xmltable(XMLNAMESPACES('http://test/asdf/bean' as "bean",  
default 'http://example.org/SCL/CommonTypes') , '/bean:TransactionData/TransactionRequest/CustomerId'  
passing xmltype('<ns:TransactionData xmlns:ns="http://test/asdf/bean" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns:TransactionData">
        <TransactionRequest xmlns:nste="http://pegasus/component/payment/bean" xsi:type="nste:bankTransferRequest">
                <CustomerId>0001</CustomerId>
                <Account>12332131321331</Account>
                <Currency>MMK</Currency>
                <Reference>83550 test</Reference>
        </TransactionRequest>
</ns:TransactionData>'));

如果要使用bean作为名称空间前缀：

select t.* from xmltable(XMLNAMESPACES('http://test/asdf/bean' as "ns") 
,'//ns:TransactionData/TransactionRequest/CustomerId'
 passing xmltype('<ns:TransactionData xmlns:ns="http://test/asdf/bean" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns:TransactionData">
        <TransactionRequest xmlns:nste="http://pegasus/component/payment/bean" xsi:type="nste:bankTransferRequest">
                <CustomerId>0001</CustomerId>
                <Account>12332131321331</Account>
                <Currency>MMK</Currency>
                <Reference>83550 test</Reference>
        </TransactionRequest>
</ns:TransactionData>')) as t

使用Oracle 12.1和SQLplus的输出示例

select t.* from xmltable(XMLNAMESPACES('http://test/asdf/bean' as "bean") 
,'//bean:TransactionData/TransactionRequest/CustomerId'
 passing xmltype('<ns:TransactionData xmlns:ns="http://test/asdf/bean" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns:TransactionData">
        <TransactionRequest xmlns:nste="http://pegasus/component/payment/bean" xsi:type="nste:bankTransferRequest">
                <CustomerId>0001</CustomerId>
                <Account>12332131321331</Account>
                <Currency>MMK</Currency>
                <Reference>83550 test</Reference>
        </TransactionRequest>
</ns:TransactionData>')) as t

---

请在您的问题中添加更多详细信息。例如，什么不起作用。删除此项，默认值'http://example.org/SCL/CommonTypes'. 这里不需要它。我在Oracle 12c数据库中有一个表，其中包含一个XML类型的列，如上面的示例XML。但当我检索时，如上面的查询。它不能返回任何数据，也可以尝试选择EXTRACTVALUExmltypeXMLField，'/ns/：TransactionData/TransactionRequest/Field[@key=CustomerId]'MyTable中的CustomerId也是返回空白字段。bean命名空间存在于XML中。它只是有一个不同的前缀。前缀不需要匹配，URI是。关于默认名称空间，您是对的。为什么要使用不同的前缀？谢谢，我尝试使用bean名称空间进行查询。但它也不会返回任何结果。请建议我。谢谢发布的查询返回CustomerId。“你不喜欢它的什么地方？”雷内，你为什么不喜欢？这没什么区别。前缀完全是短暂的。OP的代码在这方面是完美的。

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> select t.* from xmltable(XMLNAMESPACES('http://test/asdf/bean' as "bean")
  2  ,'//bean:TransactionData/TransactionRequest/CustomerId'
  3   passing xmltype('<ns:TransactionData xmlns:ns="http://test/asdf/bean" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns:TransactionData">
  4          <TransactionRequest xmlns:nste="http://pegasus/component/payment/bean" xsi:type="nste:bankTransferRequest">
  5                  <CustomerId>0001</CustomerId>
  6                  <Account>12332131321331</Account>
  7                  <Currency>MMK</Currency>
  8                  <Reference>83550 test</Reference>
  9          </TransactionRequest>
 10  </ns:TransactionData>')) as t;

COLUMN_VALUE
--------------------------------------------------------------------------------
<CustomerId>0001</CustomerId>