🔥 Most Asked SQL Aggregation Patterns (Real Business Problems)
🔹 Find the Top-Selling Product in Each Category → GROUP BY + RANK()
🔹 Calculate Monthly Revenue Trends → GROUP BY + DATE Functions
🔹 Find Customers Who Spent More Than Average → GROUP BY + HAVING
🔹 Identify Duplicate Records → GROUP BY + HAVING COUNT(*)
🔹 Find the Most Active Users → COUNT() + GROUP BY
🔹 Calculate Running Revenue Totals → SUM() OVER()
🔹 Find the Highest & Lowest Sales by Region → MAX(), MIN() + GROUP BY
🔹 Rank Employees by Department Salary → DENSE_RANK() + PARTITION BY
🔹 Calculate Average Order Value by Customer → AVG() + GROUP BY
🔹 Find the Percentage Contribution of Each Product → SUM() OVER()
❤️ React if you want more SQL interview patterns based on real company problems!
3August 25, 2026 854 9
