The toughest database questions asked at Meta, Amazon, Apple, Netflix, Google, and Microsoft. Test your SQL skills with complex joins, window functions, CTEs, and multi-step analytics.

FAANG SQL 50

Data Engineering

DSA 150

MLE Coding 75

Learn NumPy in 14 Days

Learn Python in 14 Days

Learn SQL in 21 Days

Meta SQL

Stats Superhero

ML Ninja

Pandas Pro

AB Experiment Evaluation

Apple Device User Totals

Average Session Duration

Average Session Travel Distance

Average Star Ratings

Avg Transaction Amount

Avg Trip Time by Zip

Best Actors per Genre

Best Support Agent Rankings

Best Three Categories

CTR by Website Type

Client-Only User Counts

Consumable Brand Customer Share

Country Comment Rank Change

Daily Friend Acceptance Rate

Ad Spend Per Ad

Bottom 10 Hotel Ratings

Count Mutual Second-Degree Friends

Count multilingual users

Cumulative Monthly Sales Average

Daily Mobile/Web Logins

Handyman Employee Rate

Impute App Ratings

Most Frequent Letters

Most Votes by Employee

Daily Removal Rate

Daily User Interaction Totals

Email Counts by Label

Flagging Metrics Summary

Friday Friend Likes

Highest-Liked Channel Posts

Highest-Value Library Books

Media-Type Sales Breakdown

Month-over-Month Sales Growth

Monthly Retention Ratio

No Reaction Rate

Paying Premium Retention

Popular Payment Method

Promotion Edge-Day Transaction Share

Sales by Product Family

Survivors by Sex and Class

CTR by Ad Type

Daily Video Reactions

Longest Winning Run

Mutual Friends Query

Pair Fans With Haters

Post Action Distribution

Average Feature Progress

Report Reason Percent

Best January Sellers

FAANG SQL 50

IoU