sql - 简单的 MS SQL 计数问题

Question

我有这个SQL

DECLARE @url varchar(100)
SET @url = 'http://mysite.com/%'

SELECT
[UserSessionSequenceID]
      ,[SiteID]
      ,[Referer]
      ,[Timestamp]
,ROW_NUMBER() over (PARTITION BY [Referer] ORDER BY referer DESC) AS sort 
  FROM [tblSequence]
WHERE [Referer] IS NOT NULL AND [Referer] NOT LIKE @url AND siteID = 15

想要计算唯一引用者 - 问题是此 SQL 返回所有匹配项并一一计算。我只想要每个唯一引荐来源网址的计数(并且仍然用类似的方式排除@url)。

怎么做？

Answer 1

SELECT
      [Referer], Count([Referer]) as RefCount
  FROM [tblSequence]
WHERE [Referer] IS NOT NULL AND [Referer] NOT LIKE @url AND siteID = 15
GROUP BY [Referer]

恢复订单(如果确实需要)取决于您的具体要求。