Question

鉴于以下XPath CTE，我想在Field2上进行过滤。怎么能实现呢？我只是学习XPath。使用SQL Server 2008 R2。

WITH ConvertedToXML AS 
( 
     SELECT TOP 10 
         xml_msg AS AsVarchar,
         CAST(xml_msg AS XML) AS AsXml 
     FROM 
         Table
     ORDER BY
         date_received desc
) 
SELECT 
    ConvertedToXML.AsXml.value('(//Field1)[1]', 'varchar(max)') AS Field1,
    ConvertedToXML.AsXml.value('(//Field2)[1]', 'Varchar(10)') as Field2,
    ConvertedToXML.AsVarchar,
    ConvertedToXML.AsXml 
Into #TempXML
FROM ConvertedToXML;

Answer 1

如果我正确理解了这个问题，您希望过滤Field2值等于某个值foo的行，例如，您可以这样做：

SELECT 
    ......
    ......
Into #TempXML
FROM ConvertedToXML
WHERE ConvertedToXML.AsXml.value('(//Field2)[1]', 'Varchar(10)') = 'foo';

或者使用XPath谓词来获取值等于Field2的{{1}}个元素，并使用exists()方法执行XPath：

"foo"

过滤cte xpath查询

1 个答案: