XQuery 中的注释

适用范围：SQL Server

可以在 XQuery 中添加注释。 通过使用 (: 和 :) 分隔符添加注释字符串。 例如：

DECLARE @x AS XML;
SET @x = '';

SELECT @x.query('
(: simple query to construct an element :)
<ProductModel ProductModelID = "10" />
');

以下示例展示了对 InstructionsXML 类型的列的查询：

SELECT Instructions.query('
(: declare prefix and namespace binding in the prolog. :)
     declare namespace AWMI = "http://schemas.microsoft.com/sqlserver/2004/07/adventure-works/ProductModelManuInstructions";
  (: Following expression retrieves the <Location> element children of the <root> element. :)
  /AWMI:root/AWMI:Location
') AS Result
FROM Production.ProductModel
WHERE ProductModelID = 7;