[해커랭크] MySQL 서브쿼리 - Top Competitors

Top Competitors | HackerRank Query a list of top-scoring hackers. www.hackerrank.com 문제) Julia just finished conducting a coding contest, and she needs your help assembling the leaderboard! Write a query to print the respective hacker_id and name of hackers who achieved full scores for more than one challenge. Order your output in descending order by the total number of challenges in which the h..

원문링크 : [해커랭크] MySQL 서브쿼리 - Top Competitors