Question

我有一个表，其中有一个名为“ServiceConfig”的列，其数据类型为xml。

我有一个xml的记录，如下所示：

<Config>
  <services>
    <service name="pro" />
    <service name="postdata" />
  </services>
</Config>

现在，我想将<service name="pro" />替换为<service name="pro" username="u" password="p"/>。因此得到的XML将是

<Config>
  <services>
    <service name="pro" username="u" password="p"/>
    <service name="postdata" />
  </services>
</Config>

我如何实现它？

Answer 1

一种方法是添加像这样的新属性......

DECLARE @xmltest TABLE (ServiceConfig XML)
DECLARE @username VARCHAR(15) = 'u'
DECLARE @password VARCHAR(15) = 'p'
DECLARE @xml xml

INSERT @xmlTest values ('<Config>
                           <services>
                             <service name="pro" />
                             <service name="postdata" />
                           </services>
                         </Config>')

SELECT @xml = ServiceConfig from @xmltest

SET @xml.modify('insert (attribute username {sql:variable("@username")}, 
                         attribute password {sql:variable("@password")}) 
                         as last into (/Config/services/service)[1]')

UPDATE @xmltest SET ServiceConfig = @xml

SELECT * FROM @xmltest

Click here to go to SQL Fiddle demo of above code

替换XML节点

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