SQL Interview Questions and Answers | Active User Retention (FAANG Companies)

Master the "Active User Retention" SQL problem, a favorite at Meta, Amazon, and Google! In this first episode of our MAANG SQL Interview Series, we break down how to calculate the percentage of users who return to a platform exactly 7 days after their first login.
What You’ll Learn:
How to structure a solution using CTEs (Common Table Expressions).
Using INNER JOINs to find the intersection of user sets.
Handling edge cases like Division by Zero using NULLIF

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Видео SQL Interview Questions and Answers | Active User Retention (FAANG Companies) канала Udit Singhal