从 varchar(max) 列中选择 XML

Select XML from varchar(max) column(从 varchar(max) 列中选择 XML)
本文介绍了从 varchar(max) 列中选择 XML的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

问题描述

我在 SQL Server 2005 的 varchar(max) 列中存储了一些 XML 数据.数据采用以下格式(FQTN = 完全限定类型名称):

I have some XML data stored in a varchar(max) column on SQL Server 2005. The data is in the form (FQTN = fully qualified type name):

<?xml version="1.0" encoding="utf-16"?>
<History xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <EntityViews>
    <EntityProxy Type="FQTN" Key="386876" />
    <EntityProxy Type="FQTN" Key="387981" />
    <!-- etc. -->
  </EntityViews>
</History>

如何选择类型、键,以便从该列中的 XML 数据中获得单行的表格结果?该表有一个名为 HistoryId 的身份主键.

How can I select Type, Key so that I get a tabular result from the XML data in this column for a single row? The table has an identity primary key named HistoryId.

推荐答案

;with cteCastToXML as (
    select CAST(YourColumn as xml) as x
        from YourTable
)
select h.ep.value('@Type','varchar(10)') as [Type],
       h.ep.value('@Key', 'varchar(10)') as [Key]
    from cteCastToXML
        cross apply x.nodes('/History/EntityViews/EntityProxy') as h(ep)

这篇关于从 varchar(max) 列中选择 XML的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

本站部分内容来源互联网,如果有图片或者内容侵犯了您的权益,请联系我们,我们会在确认后第一时间进行删除!

相关文档推荐

SQL query to group by day(按天分组的 SQL 查询)
What does SQL clause quot;GROUP BY 1quot; mean?(SQL 子句“GROUP BY 1是什么意思?意思是?)
Include missing months in Group By query(在 Group By 查询中包含缺失的月份)
sql group by versus distinct(sql group by 与不同)
How to return a incremental group number per group in SQL(如何在SQL中返回每个组的增量组号)
Count number of records returned by group by(统计分组返回的记录数)