Question

我正在尝试对按派生列排序的查询使用SQL Server 2008排名函数。这是一个例子

SELECT 
    table.FirstName, table.LastName, 
    CalculatedValue(table.number) As Points, 
    ROW_NUMBER() OVER (ORDER BY points) AS 'Row Number' 
FROM table 
ORDER BY points

我总是收到错误无效的列名“points”，因为根据我读过的内容，OVER函数不能使用别名。

有没有人知道我可以检索由派生列排序的结果集的连续行号的替代方法？

Answer 1

如何使用派生表（子查询）？我认为以下内容应该有效

SELECT 
    ROW_NUMBER() OVER (ORDER BY sub.Points) AS 'Row Number',
    sub.FirstName,
    sub.LastName,
    sub.Points
FROM
(

    SELECT 
        table.FirstName, 
        table.LastName, 
        CalculatedValue(table.number) As Points
    FROM 
        table    
) sub
ORDER BY
    sub.Points

Answer 2

使用CTE计算您的积分，然后在CTE上排名。

 WITH tableWithPoints AS (
   SELECT 
       table.FirstName, table.LastName, 
       CalculatedValue(table.number) As Points
   FROM table)

 SELECT FirstName, LastName, Points,
     ROW_NUMBER() OVER (ORDER BY Points) AS 'Row Number' 
 FROM 
     tableWithPoints ORDER BY Points

将SQL排名函数与派生列一起使用

2 个答案: