如何select第二行或第三行SQL查询

Question

我有这个查询：

SELECT TOP 6 
    NoMachine, COUNT(NoMachine) AS Calls 
FROM 
    DT 
GROUP BY 
    NoMachine 
ORDER BY 
    Calls DESC;

这6条记录中，我要select每一条，第一条，第二条，第三条，等等

最简单的方法是什么？我正在使用 SQL Server 2008 R2。

Answer 1

使用row_number()

select * from 
(SELECT  NoMachine,
 COUNT(*) AS Calls,
 row_number()over(order by  Calls DESC) rn
 FROM DT GROUP BY NoMachine 
) a where rn in (2,3)

How to select the second or third row of SQL Query