ORDER BY 子句在视图、内联函数、派生表、子查询和公用表表达式中无效 [重复]

Question

我正在尝试在我的视图中添加 order by 子句，但它会引发错误。

ORDER BY 子句在视图、内联函数、派生表、子查询和公用表表达式中无效，除非还指定了 TOP、OFFSET 或 FOR XML。

   ALTER VIEW [dbo].[vw_Test_booking]
   AS
    select NEWID() as UniqueKey, * from (
        SELECT  [startdatetime]           AS StartDateTime,    
               [bookingdatetime]         AS BookingDateTime, 
               [firstname]               AS firstname       
         FROM   [dbo].[vw_Testpatient] 
        WHERE  statusCode in (                       
        '2',    
        '0      
        )       
    ) T
    ORDER BY startdatetime DESC


GO

Answer 1

正如它所说 - 您不能在视图定义中包含 ORDER BY 子句。同理，当 SELECT 没有应用 ORDER BY 时，从表中返回的数据的顺序意味着不能保证数据的顺序。

在从视图中选择的查询中应用 ORDER BY。

代替

ALTER VIEW [dbo].[vw_Test_booking]  
AS  
 select NEWID() as UniqueKey, * 
 from (
    SELECT  [startdatetime]           AS StartDateTime,    
           [bookingdatetime]         AS BookingDateTime, 
           [firstname]               AS firstname       
    FROM   [dbo].[vw_Testpatient] 
    WHERE  statusCode in (                       
    '2',    
    '0      
 )       
) T
ORDER BY startdatetime DESC

像这样应用它

SELECT *
FROM dbo.vw_Test_booking
ORDER BY StartDateTime  DESC