如何从SQL Server 2008中的XML变量中删除属性?

问题描述

我有一个名为XML的表(在SQL Server 2008中)，并且有一个名为XmlDocument的类型为XML的字段.我正在尝试从XML变量中删除属性.

I have a table called XML (in SQL Server 2008) and it has a field called XmlDocument of type XML. I am trying to to delete an attribute from an XML variable.

这是我的xml的样子

<clue_personal_auto xmlns="http://cp.com/rules/client">
  <admin>
     <receipt_date>03/16/2011</receipt_date>
     <date_request_ordered>03/16/2011</date_request_ordered>
     <report_usage>Personal</report_usage>
  </admin>
</clue_personal_auto>

我的查询

UPDATE XML
SET XmlDocument.modify('delete  (/clue_personal_auto/@xmlns)[1]')
 WHERE xmlid = 357

当我在查询分析器中运行此查询时，看到消息受影响的1行"，但实际上并未删除clue_personal_auto元素的xmlns属性.不知道我在做什么错.

When I run this query in query analyzer I see the message "1 row(s) affected" but in reality the xmlns attribute of clue_personal_auto element is not being removed. Any idea what am I doing wrong.

谢谢BB

推荐答案

我似乎找不到一种简便的方法-但真正的问题仍然存在:为什么，您想删除吗命名空间?使用WITH XMLNAMESPACES ...构造，您可以轻松使用命名空间.

I can't seem to find an easy way to do this - but the real question remains: why do you want to remove the namespace?? Using the WITH XMLNAMESPACES ... construct, you can easily make use of the namespaces.

与其花费大量精力消除它，不如了解XML命名空间并开始使用它们！

Instead of putting a lot of effort in getting rid of it - learn about XML namespaces and start using them!

您可以在查询中轻松使用该XML名称空间:

You can quite easily use that XML namespace in your queries:

;WITH XMLNAMESPACES (DEFAULT 'http://cp.com/rules/client' )
SELECT
    XmlDocument.value('(/clue_personal_auto/admin/report_usage)[1]', 'varchar(25)')
FROM XML
WHERE ID = 357

并对此感到满意-不再需要人为地删除xmlns=声明！

and be happy with it - no need to artificially remove xmlns= declarations anymore!

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