Q&A for people studying math at any level and professionals in related fields
select u.id, count(v.VoteTypeid) from Votes v join posts p on v.PostId=v.id join users u on u.id= p.OwnerUserId where v.VoteTypeid = 2 and v.creationDate between '2011-03-13' and '2011-05-19' group by u.id