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How long between a question is asked, and the answer arrives....

Q&A for those who study, teach, research and apply economics and econometrics

-- measure from the answer time, not the question time.
-- this implies certain things, more to follow.

declare @history as int = - ##Weeks:int?60##
declare @zombie as int = ##Zombie:int?30##
;

--with (
    select p.Id,
           p.CreationDate as QDate,
           min(a.CreationDate) as ADate
    from Posts p,
         Posts a
    where p.Id = a.ParentId
      and p.PostTypeId = 1
      and a.PostTypeId = 2
      and a.ClosedDate is null
      and p.closedDate is null
      and a.CreationDate >= convert(Date, DateAdd(week, @history, CURRENT_TIMESTAMP))
    group by p.Id, p.CreationDate
--) as QandA

--select count (*) from QandA

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edited feb 26 14

created feb 26 14 rolfl