过滤器最大值 rn

【问题标题】：Filter max of rn过滤器最大值 rn
【发布时间】：2011-03-15 09:08:13
【问题描述】：

如何在此处过滤 rn 的最大值

select  *
from    (
        select  *
        ,       row_number() over (partition by name order by ox asc) as rn
        from    YourTable
        ) as SubQueryAlias
where   rn = 1

在其归档上方rn = 1

我要过滤rn = max(rn)

【问题讨论】：

标签： sql sql-server-2008 tsql sql-server-2005 window-functions

【解决方案1】：

将order by ox asc 更改为order by ox desc 并使用rn = 1

select  *
from    (
        select  *
        ,       row_number() over (partition by name order by ox desc) as rn
        from    YourTable
        ) as SubQueryAlias
where   rn = 1

【讨论】：

【解决方案2】：

检查这个以获得 rn = max(rn)：

select top 1 * from 
( select * , 
    row_number() over (partition by name order by ox asc) 
    as rn from YourTable ) 
as SubQueryAlias 
order by rn desc

【讨论】：