SQL Server 2008 列前缀错误

Question

所以我可以正常工作:

CREATE FUNCTION dbo.GetLiveStream(@UserName NVARCHAR(MAX)) RETURNS TABLE
AS
  RETURN (
    SELECT DISTINCT l.* 
      FROM StreamView l
      JOIN Friendships f ON f.Sender = @UserName OR f.Recipient = @UserName 
     WHERE l.Sender <> @UserName 
       AND l.Recipient <> @UserName 
       AND (   l.Sender = f.Recipient 
            OR l.Sender = f.Sender 
            OR l.Recipient = f.Sender 
            OR l.Recipient = f.Recipient) 

  )
GO

但是当尝试执行以下查询时:

SELECT ROW_NUMBER() OVER(ORDER BY DateTime DESC) AS RowNumber, 
       * 
  FROM dbo.GetLiveStream('jason') 
  WHERE RowNumber >= 0
  AND RowNumber < 0+ 10; 

我收到以下错误:

Msg 207, Level 16, State 1, Line 4
Invalid column name 'RowNumber'.
Msg 207, Level 16, State 1, Line 5
Invalid column name 'RowNumber'.

请注意，指定 l.* 会返回此错误:

Msg 107, Level 15, State 1, Line 2
The column prefix 'l' does not match with a table name or alias name used in the query.

GetLiveStream 是一个函数:

RETURN (
    SELECT DISTINCT l.* 
      FROM StreamView l
      JOIN Friendships f ON f.Sender = @UserName OR f.Recipient = @UserName 
     WHERE l.Sender <> @UserName 
       AND l.Recipient <> @UserName 
       AND (   l.Sender = f.Recipient 
            OR l.Sender = f.Sender 
            OR l.Recipient = f.Sender 
            OR l.Recipient = f.Recipient) AND f.IsPending = 0

  )

如何解决？谢谢。

Answer 1

您不能在 WHERE 子句中引用别名。这样做:

select *
from
(
    SELECT ROW_NUMBER() OVER(ORDER BY DateTime DESC) AS RowNumber, 
           * 
      FROM dbo.GetLiveStream('jason') 
) a
  WHERE RowNumber >= 0
  AND RowNumber < 0+ 10; 

至于您的 l.* 错误，那是因为该别名是函数及其查询定义的本地别名，无法在其外部引用。