SQL Server XML 列上的 Where 子句过滤属性 AND 值

2021-09-10 00:00:00 xml sql tsql sql-server

我在文档"表中有一个元数据"字段，其中包含以下数据:

I have a 'Metadata' field in table 'Document' that has the following data:

<properties>
  <property name="someProp">xyz</property>
  <property name="reportId">55</property>
  <property name="someOtherProp">abc</property>
</properties>'

如何编写一个查询来返回存在名称为reportId"的属性元素并且reportId"属性元素的值为 55 的记录?有时reportId"属性节点是唯一存在的节点，有时不存在，并且它并不总是按上述顺序排列，因此我无法查询绝对位置.有什么想法吗?

How can I write a query that returns records where a property element exists with a name of "reportId" and that "reportId" property element has a value of 55? Sometimes the "reportId" property node is the only one that exists, sometimes not, and it's not always in the above order so I can't query on absolute positions. Any ideas?

推荐答案

不需要提取值.使用 exist() 方法(xml 数据类型) 代替.

There is no need to extract the value. Use exist() Method (xml Data Type) instead.

select *
from Document
where Metadata.exist('/properties/property[@name="reportId" and . = 55]') = 1

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