알고리즘
[SQL]해커랭크 Top Competitors
✅ 코드 SELECT H.hacker_id , H.name FROM Submissions AS S INNER JOIN Challenges AS C ON S.challenge_id = C.challenge_id INNER JOIN Difficulty AS D ON C.difficulty_level = D.difficulty_level INNER JOIN Hackers AS H ON S.hacker_id = H.hacker_id WHERE D.score = S.score AND D.difficulty_level = C.difficulty_level GROUP BY H.hacker_id , H.name HAVING COUNT(S.submission_id) > 1 ORDER BY COUNT(S.submissio..
