In this video, we solve LeetCode SQL Problem: Department Highest Salary using Common Table Expressions (CTE) and window functions like DENSE_RANK().
We identify employees with the highest salary in each department, which is a classic SQL challenge used in real-world reporting and often asked in tech interviews.
✅ Key SQL Concepts Covered:
WITH clause / CTEs (Common Table Expressions)
DENSE_RANK() window function
PARTITION BY and ORDER BY
INNER JOIN to map departments
Filtering top-ranked salaries
📊 Problem Type: SQL Intermediate
🔍 LeetCode Tag: #Database
🎯 Difficulty: Medium
🎥 This is part of my LeetCode SQL playlist:
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#LeetCodeSQL #SQLTutorial #DepartmentHighestSalary #CTE #WindowFunctions #CodingInterview #SQLForBeginners
