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    what am I doing wrong I am getting No response on stdout

    SELECT h.hacker_id,h.name FROM Hackers h JOIN Challenges c ON h.hacker_id = c.hacker_id JOIN difficulty d ON c.difficulty_level = d.difficulty_level JOIN Submissions s ON c.challenge_id = s.challenge_id WHERE s.score = d.score GROUP BY h.hacker_id,h.name HAVING COUNT(DISTINCT s.challenge_id) > 1 ORDER BY COUNT(DISTINCT s.challenge_id) DESC, h.hacker_id ASC