About SQLSimplified

SQLSimplified is a free, SEO-first SQL learning platform. Our goal is to become the definitive place to learn SQL, combining clear documentation with hands-on practice.

Beginner friendly

Every lesson assumes no prior SQL knowledge and builds up gradually, one concept at a time.

Learn by doing

Every example runs against a real, in-browser database powered by DuckDB WASM, no signup, no setup.

Built for depth

From your first SELECT to recursive CTEs and window functions, the roadmap goes all the way to advanced SQL.