
[Leetcode] 1280. Students and Examinations
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SQL
Write a solution to find the number of times each student attended each exam.Return the result table ordered by student_id and subject_name.학생이 본 시험 횟수를 계산하는 문제. Explanation: The result table should contain all students and all subjects. Alice attended the Math exam 3 times, the Physics exam 2 times, and the Programming exam 1 time. Bob attended the Math exam 1 time, the Programming exam 1 time..