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google search
Google search results:
1: https://stackoverflow.com/questions/62739128/sql-find-max-value-and-number-of-rows-whic-are-equal-to-that-value
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2: https://nifannn.github.io/2017/10/24/SQL-Notes-Hackerrank-Challenges/
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3: https://www.chegg.com/homework-help/questions-and-answers/coding-platform-maintains-participating-hackers-data-hacker-table-write-query-print-names--q66177970
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4: https://zhangwenxuan1.medium.com/hacker-rank-sql-challenge-15-days-of-learning-sql-71caf3696818
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5: https://gist.github.com/asutosh97/2956b22fa1956bffaac93710bb89f54f
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6: http://codesnippetfromhackerrank.blogspot.com/2017/05/sql-basic-join-top-competitors.html
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7: https://dsfaisal.com/articles/2020-11-05-hackerrank-sql-problem-solving/
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8: https://www.hackerrank.com/challenges/challenges/forum
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9: https://www.hackerrank.com/faq
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10: https://www.apdaga.com/2021/03/hackerrank-sql-basic-join-top-competitors-having-inner-join-in-sql.html
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11: https://lawcat.berkeley.edu/record/1116745/files/fulltext.pdf
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