select top 30 Users.DisplayName, BestComment.Id, Max(Best...

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Amateur Radio

Q&A for amateur radio enthusiasts

select top 30 Users.DisplayName,
              BestComment.Id, Max(BestComment.Score),
              WorstComment.Id, Min(WorstComment.Score)
from Users
  join (select Comments.Id, Comments.Score, Comments.UserId
        from Comments) BestComment
    on BestComment.UserId = Users.Id
  join (select Comments.Id, Comments.Score, Comments.UserId
        from Comments) WorstComment
    on WorstComment.UserId = Users.Id
  where BestComment.Score>0
    and WorstComment.Score<=0
group by Users.DisplayName, BestComment.Id, WorstComment.Id

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