Learn SQL Online Free — Run Queries in Your Browser

A free SQL course with a built-in query playground. No download, no database setup — write SELECT, JOIN, GROUP BY and window functions and see real results instantly.

What you'll learn

The easiest way to learn SQL: open a lesson and start querying. No MySQL install, no signup wall — a real SQLite engine runs inside every lesson, so you type a query, hit Run, and see rows. Learn filtering, aggregation, joins, subqueries, CTEs and window functions on small Indian datasets, with quizzes and predict-the-output checks. Beginner to job-ready in 36 lessons, free, with a certificate.

Why Techwave Academy

• All 17 courses are free on signup — no credit card, no trial, no upgrade pop-ups.
• In-browser IDE — write and run code without installing anything.
• AI mentor — 24×7 doubt clearing in plain language.
• India-first — Hindi/Hinglish narration where useful, CBSE alignment for school courses.
• Built by working software engineers — not theoreticians.

What you get on signup (₹0)

A single phone-number signup unlocks every course on the platform: AI Beginner, Python for Class 4 / 6 / 8 / 10 / 12 (CBSE 083), Git Basics, Linux Basics, Spoken English, IOI / Olympiad Prep, Foundation Bootcamp, Blind 75, NeetCode 150, Claude Mastery, and Tableau & Power BI & SQL for Data Analysts. Yes, all 17 — forever free.

Start now

Open the course →