LeetCode 1280 Students and Examinations Solution explained step by step in SQL.
In this video, we solve the LeetCode problem **"Students and Examinations"**, an easy-level SQL question that helps beginners understand how to work with **CROSS JOIN**, **LEFT JOIN**, and **aggregation (COUNT)**.
We start by breaking down the problem statement and then build the solution step by step. You’ll learn how to:
* Generate all possible student-subject combinations using CROSS JOIN
* Use LEFT JOIN to include students who didn’t attend exams
* Count the number of exams attended using aggregation functions
* Handle missing data effectively
This problem is perfect for improving your understanding of joins and grouping in SQL, which are essential for interviews and real-world queries.
Problem: Students and Examinations
Platform: LeetCode
Problem Number: 1280
Great for beginners aiming to strengthen their SQL fundamentals 🚀 #java
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