如何在 SQL Server 2008 中查询 XML 列

2021-10-01 00:00:00 xml sql-server

我使用的是 SQL Server 2008

I am using SQL Server 2008

我有一个包含 xml 数据的表,如下所示:

I have a table with xml data looks like:

ID           xml_col  
1            <Attribute id="7">1.0</Attribute><Attribute id="8">AAA</Attribute>  
2            <Attribute id="7">2.0</Attribute><Attribute id="8">BBB</Attribute>  
3            <Attribute id="7">3.0</Attribute><Attribute id="8">AAA</Attribute>  
4            <Attribute id="7">1.0</Attribute><Attribute id="8">BBB</Attribute>  
5            <Attribute id="7">1.0</Attribute><Attribute id="8">AAA</Attribute>  
6            <Attribute id="7">7.0</Attribute><Attribute id="8">CCC</Attribute>  

我想得到那些记录

'when attribute=17 then value =1'+ 'when attribute=8 then value='AAA''

如何创建查询以及如何构建 xml 索引?

How can i create the query and how to build xml indexes?

非常感谢.

推荐答案

要选择具有您提到的条件的所有行,请尝试以下选择语句:

To select all rows which have the criteria you mentioned, try this select statement:

SELECT * 
FROM dbo.YourXmlTable
WHERE
YourXmlTable.xml_col.value('(//Attribute[@id=7])[1]', 'decimal') = 1.0
AND 
    YourXmlTable.xml_col.value('(//Attribute[@id=8])[1]', 'varchar(10)') = 'AAA'

对于 XML 索引,请阅读在线书籍 如何创建它们以及如何使用它们.

For XML indices, read up on Books Online how to create them and how to use them.

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