Скачать или смотреть 🔍 Facebook Active User Retention | SQL Interview Question (DataLemur)

🚀 Facebook SQL Interview Question - Active User Retention
In this video, we solve the Active User Retention question from DataLemur. This is a commonly asked SQL interview question in product-based companies like Facebook, Google, Amazon, and more.

📌 Problem Link:
👉 Active User Retention (DataLemur)

💡 Problem Statement:

We need to find the Monthly Active Users (MAUs) for July 2022. An active user is someone who has performed actions like sign-in, like, or comment in both the current month and the previous month.

🎯 What You’ll Learn in This Video:

✅ How to use Common Table Expressions (CTEs) in SQL
✅ Using EXTRACT(MONTH FROM event_date) for filtering data
✅ Applying INNER JOIN to find users active in both months
✅ Optimizing SQL queries for interview scenarios

📌 More SQL & Coding Practice:

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💬 Have any doubts? Drop a comment below! 👇

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