Top contributors by posts for Firefox for Android questions

gistfile1.txt

SELECT username, count(*) as answernum
FROM questions_question qq
JOIN questions_answer qa ON qa.question_id = qq.id
JOIN auth_user au ON qa.creator_id = au.id
WHERE qa.created >= '2014-01-01' and qa.created <= '2014-12-01 0'
AND qq.`product_id`=2
AND NOT qa.creator_id = qq.creator_id
GROUP BY username ORDER BY answernum DESC limit 100;