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Physics

Q&A for active researchers, academics and students of physics

--accepted answer
select b.OwnerUserId, count(b.Id)
from Posts a inner join Posts b
on a.PostTypeId = 1
and b.PostTypeId = 2
and b.ParentId = a.Id
and DATEDIFF(mi,a.CreationDate,b.CreationDate) < ##MaxDuration##
group by b.OwnerUserId

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