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Q&A for professional mathematicians

select q.Id, 
       min(datediff(minute, q.CreationDate, a.CreationDate)) as [TimeInterval] 
       from Posts q 
  inner join Posts a on a.ParentId=q.Id 
  where q.Id > ##minId## 
group by q.Id
order by q.Id asc

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edited dec 19 13

created dec 19 13 jon.doe12549