🏢 SQL Query to Find Primary Department for Each Employee | LeetCode SQL #31

🚀 In this video, we solve "Primary Department for Each Employee" from LeetCode, an essential SQL problem for understanding GROUP BY, HAVING, UNION, and conditional filtering.

📌 What You’ll Learn:
✅ How to use GROUP BY & HAVING to filter unique department assignments
✅ Leveraging UNION to combine multiple query results
✅ Using conditional filtering (WHERE primary_flag = 'Y') for primary department selection

📌 Problem Link: https://leetcode.com/problems/primary-department-for-each-employee

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