SQLlearn

Learn SQL the fast way. SQL Learn gives you bite-sized modules, real datasets, instant feedback, hints, and spaced-repetition review — all on your phone, all offline. • 6 modules covering SELECT, filtering, joins, aggregates, subqueries, and window functions • 30+ hands-on challenges with real e-commerce, HR, and analytics data • Instant query execution — no setup, no servers • Progressive hints when you're stuck • Spaced-repetition review queue to lock in what you learn • Schema explorer to inspect tables anytime Module 1 is free. Unlock everything with a single Pro purchase — no subscription, no ads, no tracking. Perfect for interview prep, bootcamp students, analysts, and anyone who wants SQL fluency.