xml.query() 实例演示

xml.query()函数，XQuery表达式可以返回xml一个单一的元素或是所有元素。

我们继续使用上一篇所创建表[dbo].[tbDevLanguage] http://www.cnblogs.com/insus/archive/2012/02/25/2367668.html

首先我们演示Query所有元素，注意一下查询节点，返回结果获取范围：

SELECT [languages].query('/Languages') AS [language]
FROM [dbo].[tbDevLanguage]

SELECT [languages].query('/Languages/language') AS [language]
FROM [dbo].[tbDevLanguage]

上两sql语句执行结果：

最后再演示一下返回一个元素：

SELECT [languages].query('/Languages[1]/language[1]') AS [language]
FROM [dbo].[tbDevLanguage]

SELECT [languages].query('/Languages[1]/language[2]') AS [language]
FROM [dbo].[tbDevLanguage]

SELECT [languages].query('/Languages[1]/language[3]') AS [language]
FROM [dbo].[tbDevLanguage]

上面三句SQL语句，分别取得三个元素：