Question

我必须显示我计划在SQL Server中使用Rank（）函数的用户的Rank。获取排名的Sql查询如下

select a.user_id, RANK() OVER (ORDER BY (a.quant_points) DESC) AS QRANK,
    RANK() OVER (ORDER BY (a.verbal_points) DESC) AS VRANK,
    RANK() OVER (ORDER BY (a.dilr_points) DESC) AS DRANK,
    RANK() OVER (ORDER BY (a.quant_points+a.verbal_points+a.dilr_points) DESC) AS ORANK
 from users a

但是，我只想获得特定用户的排名。如果我在上面添加一个where子句（其中user_id = @user_id），则所有等级都显示为1.

基本上，我必须查询上面的结果集，将其视为一个表。我正在考虑创建一个临时表，但觉得可能有更好的方法来实现这一目标。

Answer 1

如何创建CTE并拉出单个用户？

;with  UserRank AS
( 
    SELECT a.user_id, RANK() OVER (ORDER BY (a.quant_points) DESC) AS QRANK,
           RANK() OVER (ORDER BY (a.verbal_points) DESC) AS VRANK,
           RANK() OVER (ORDER BY (a.dilr_points) DESC) AS DRANK,
           RANK() OVER (ORDER BY (a.quant_points+a.verbal_points+a.dilr_points) DESC) AS ORANK
   FROM Users a
 )

 SELECT QRANK, VRANK, DRANK, ORANK, user_id
 FROM UserRank WHERE user_id = @foo

查询子查询

1 个答案: