SELECT y.hacker_id, name, soma
FROM(
SELECT hacker_id, SUM(max_score) as soma
FROM(
SELECT hacker_id, challenge_id, max(score) as max_score
FROM Submissions
GROUP BY hacker_id, challenge_id
) as x
GROUP BY hacker_id
) as y
INNER JOIN Hackers
ON Hackers.hacker_id = y.hacker_id
WHERE soma <> 0
ORDER BY soma DESC, hacker_id ASC
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