
[HackerRank] Challenges 문제 풀이 mysql
darami
[HackerRank] Challenges Challenges | HackerRank Print the total number of challenges created by hackers. www.hackerrank.com Julia asked her students to create some coding challenges. Write a query to print the hacker_id, name, and the total number of challenges created by each student. Sort your results by the total number of challenges in descending order. If more than one student created the s..