Find Median from Frequency – SQL Interview Challenge from FAANG!

📊 SQL Interview Problem: Find Median from Frequency Table
In this advanced SQL/Data Engineering challenge, you're asked to find the median value when you're given a frequency table — a real-world scenario in analytics and streaming data pipelines.

It’s a highly rated problem for interviews at Meta, Google, Amazon, and Stripe, where you're tested on your understanding of cumulative distributions, data expansion, and advanced aggregation techniques.

✅ In this tutorial, you’ll learn:

How to expand frequencies using SQL logic

Applying WITH, ROW_NUMBER(), SUM(), and window functions

How to simulate data expansion and calculate the median efficiently

Thinking like an interviewer to break down tricky queries

🎯 Best For:

Data Engineers

SQL-heavy Analysts

Data Scientists prepping for FAANG

Anyone facing complex SQL interviews

🧠 Difficulty: Advanced
🧰 SQL Flavor: PostgreSQL / MySQL compatible

💥 Tip: This kind of question showcases not just SQL skills but your ability to model complex logic using limited tools — a must for Big Tech interviews.

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0:00 Problem Explanation
3:46 Solution Intro
4:51 Code