1321. Restaurant Growth – 📊 SQL Rolling Average Made Simple!

In this video, we solve the "Restaurant Growth" problem from LeetCode using MySQL. Learn how to calculate the 7-day rolling average of customer spending in a restaurant. We use Common Table Expressions (CTEs) and date filtering to generate insights from time-series data.

📌 What You’ll Learn in This Video:
✅ How to use Common Table Expressions (CTEs) in SQL
✅ Calculating a 7-day moving average using JOIN and BETWEEN
✅ Applying DATE_SUB for rolling date ranges
✅ Filtering complete 7-day windows using HAVING count(*) = 7
✅ Writing efficient SQL queries for time-based analytics

🔗 LeetCode Problem:
https://leetcode.com/problems/restaurant-growth/

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