SQLCrab

SQLCrab is a practical website where you learn SQL by writing code, not just reading text. Instead of watching long tutorials, you type real SQL queries and see the results right away in your browser.

You start with simple tasks like finding and filtering data, then learn to join tables, group information, and work with bigger databases. When you make a mistake, the site shows you what went wrong so you can fix your code and improve your database skills step by step.