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以下查询在 Microsoft SQL Server Management Studio 中执行时工作正常，但是当我通过 php 运行查询时，我没有得到任何输出（mssql_query() 之后的任何内容都不会呈现）。

如果我for xml path('')从 SQL 查询中删除并再次在 php 中运行，那么现在 mssql_query() 之后的所有内容都会被渲染）。

有谁知道 xml path('') 和 PHP 的任何问题，或者我是否做错了什么。

SELECT DISTINCT x1.AcademicYearID, x1.RefNo, x1.Source, x1.Surname, x1.FirstForename, x1.Heard,convert(VARCHAR, x1.Date, 121) as Date, Notes, School, 
(SELECT DISTINCT x2.Subject + ', ' as 'data()' from [db].[dbo].[vCC_Mkt_Enquiries] x2 WHERE x1.RefNo = x2.RefNo AND x1.Source = x2.Source for xml path('')) as Subject 
FROM [db].[dbo].[vCC_Mkt_Enquiries] x1 
WHERE x1.AcademicYearID = '13/14'

PHP

$sql = "SELECT DISTINCT x1.AcademicYearID, x1.RefNo, x1.Source, x1.Surname, x1.FirstForename, x1.Heard,convert(VARCHAR, x1.Date, 121) as Date, Notes, School, 
(SELECT DISTINCT x2.Subject + ', ' as 'data()' from [db].[dbo].[vCC_Mkt_Enquiries] x2 WHERE x1.RefNo = x2.RefNo AND x1.Source = x2.Source for xml path('')) as Subject 
FROM [db].[dbo].[vCC_Mkt_Enquiries] x1 
WHERE x1.AcademicYearID = '$year'";

$internal_events = mssql_query($sql, $connection) or die ("Error in query: $sql. ".mssql_error());

请注意：永远不会呈现以下或死错误。

or die ("Error in query: $sql. ".mssql_error());
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1 回答 1

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您必须将返回的 xml 类型重新键入例如 nvarchar。像这样：

DECLARE @XML XML

SET @XML = (

SELECT something 
FROM sometable
FOR XML PATH('items')

)

SELECT CONVERT(NVARCHAR(MAX), @XML)
于 2014-01-16T06:46:19.297 回答