过滤器最大值 rn

Posted 2023-03-31

【中文标题】过滤器最大值 rn

【英文标题】：Filter max of 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)

【参考方案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

【参考方案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