About SQLSimplified

SQLSimplified is a free, SEO-first SQL learning platform. Our goal isn't to be another blog post about SQL: it's to become the definitive place to learn SQL, combining the clarity of documentation sites like MDN and Vercel Docs with the hands-on practice of SQLBolt.

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.