Master SQL by writing real queries against real databases

SQLumina is an interactive SQL learning platform. Practice on live PostgreSQL databases with 60+ real-world challenges, a Smart Debugger that explains your mistakes, daily puzzles, and 1v1 race mode — free to start, no setup, no slides.

Unlike tutorial sites, your query runs against 50,000 real rows and tells you exactly why it was slow.

Why SQLumina

• Live PostgreSQL execution in the browser — nothing to install.
• 60+ auto-graded challenges across e-commerce, social, and banking datasets.
• Smart Debugger and a step-by-step Query Visualizer.
• Daily Puzzle with streaks, plus real-time 1v1 Race Mode.

Start in the SQL Playground, practice SQL online, browse the SQL blog, see the features, or review pricing.