This Leetcode problem Highest Grade For Each Student LeetCode Solution is done in SQL.

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Highest Grade For Each Student LeetCode Solution

Problem Statement

(student_id, course_id) is the primary key of this table.

Write a SQL query to find the highest grade with its corresponding course for each student. In case of a tie, you should find the course with the smallest course_id. The output must be sorted by increasing student_id.

Example 1:
Input:

Output:

Highest Grade For Each Student LeetCode Solution MySQL

select 
  student_id, 
  min(course_id) as course_id, 
  grade 
from 
  Enrollments 
where 
  (student_id, grade) in (
    select 
      student_id, 
      max(grade) 
    from 
      Enrollments 
    group by 
      student_id
  ) 
group by 
  student_id 
order by 
  student_id asc;Code language: SQL (Structured Query Language) (sql)