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Q&A for people interested in the history and origins of science and mathematics

Select top 10 postid as [Post Link], 
  SUM(CASE WHEN VoteTypeId = 2 THEN 1 ELSE 0 END) AS 'number of up votes',
  SUM(CASE WHEN VoteTypeId = 3 THEN 1 ELSE 0 END) AS 'number of down votes'
From PostFeedback
where exists(
    select id from posts 
    where posts.id=postfeedback.postid
)
group by postid
order by 'number of up votes' desc

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edited aug 17 16

created aug 17 16 Laurel