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Q&A for professional mathematicians

SELECT
  SUM(Case When (v.VoteTypeId=2) Then 1 Else 0 End) AS [Upvotes],
  ROUND(CAST(SUM(Case When (v.VoteTypeId=2) Then 1 Else 0 End) AS decimal)/CAST(COUNT(DISTINCT q.Id) AS decimal), 2) AS [Average],
  SUM(Case When (v.VoteTypeId=3) Then 1 Else 0 End) AS [Downvotes],
  ROUND(CAST(SUM(Case When (v.VoteTypeId=3) Then 1 Else 0 End) AS decimal)/CAST(COUNT(DISTINCT q.Id) AS decimal), 2) AS [Average],
  COUNT(DISTINCT q.Id) AS [Count]
 FROM Posts q LEFT OUTER JOIN Votes v  ON v.PostId=q.Id
INNER JOIN Users u ON q.OwnerUserId=u.Id
WHERE (q.PostTypeId=1)
  AND (DATEDIFF(day, u.CreationDate, q.CreationDate)<=##days?100##)

fork query

edited jan 30 21

created jan 29 21 Martin20528