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SQL 2005使用PARTITION and Rank实现group by to
来源：程序员人生 发布时间：2014-04-10 14:19:25 阅读次数：3195次
DEMO1：
select * from
(
select Player, Year, HomeRuns, Rank() over (Partition BY Player order by HomeRuns DESC, Year DESC) as Rank
from
Batting
) tmp
where Rank = 1
DEMO2：
WITH ttts AS (
Select JournalID,ParentID,RANK() OVER (partition by ParentID orDER BY JournalID asc) AS rt From Journal_Category Where ParentID in (Select JournalID from Journal_Category where ParentID = 1) Group By ParentID,JournalID
)
Select * from ttts where ttts.rt <=1
轻松实现Group By Top
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