using group by and maximum

Question

I have a post table and postcontent table.

Each time post is edited,an entry is added to postcontent table .

On each such time a filed called version will be incremented by 1 In the postcontent table.

How can I fetch PostId, from post able and [Description] from to postcontent table Where version for each post is maximum Ie group by post id ie i am expecting one raw for each post such that it is the 'maximum of version' for the post

Answer 1

select P.PostID,
       PC.[Description]
from Post as P
inner join 
  (
    select PostID,
           [Description],
           row_number() over(partition by PostID order by [Version] desc) as rn
    from PostContent
  ) as PC
  on P.PostID = PC.PostID
where PC.rn = 1