Find Top Customer in SQL 🔥 Real Interview Problem

In this video, you’ll learn how to solve a popular SQL interview question: 👉 Find the customer who placed the maximum number of orders This is a fundamental problem that tests your understanding of GROUP BY, COUNT, and aggregation logic. We will solve this using 2 different approaches. Topics covered: ✅ Problem understanding ✅ Counting orders per customer ✅ Approach 1: GROUP BY + COUNT + TOP ✅ Approach 2: GROUP BY + HAVING + MAX() Subquery ✅ Step-by-step explanation ✅ Interview tips and optimization By the end of this video: • You’ll understand aggregation concepts clearly • You’ll be able to solve similar ranking problems • Your SQL interview preparation will improve 🎯 Perfect for: SQL beginners Data Analysts Data Engineers SQL interview preparation 👉 Practice the queries yourself 👉 Rewatch for clarity 👉 Share with your SQL learning group Visit www.bigdatayatra.com All views are my own. SQL Script CREATE TABLE Orders ( order_number INT, customer_number INT ); INSERT INTO Orders (order_number, customer_number) VALUES (1, 1), (2, 2), (3, 3), (4, 3); INSERT INTO Orders (order_number, customer_number) VALUES (1, 1), (2, 2), (3, 3), (4, 3), (5, 2);