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Q&A for pro webmasters
select count(*) Count from Posts q join Posts a on a.ParentId = q.Id where q.PostTypeId = 1 and q.ClosedDate is null and a.PostTypeId = 2 and a.Score >= 1 and a.OwnerUserId = ##UserId## and -- exclude self answered IsNull(q.OwnerUserId, -1) <> a.OwnerUserId and exists(select 1 from PostHistory ph where ph.PostHistoryTypeId in (4,5) and ph.PostId = a.ParentId and ph.UserId = a.OwnerUserId and abs(datediff(hh, ph.CreationDate, a.CreationDate)) < 12)