DB
Runs 100% in your browser — no install needed

Learn SQL
and databases
by actually doing it.

Interactive SQL lessons with a live PostgreSQL, SQLite & NoSQL playground. Run queries, design schemas, track progress — all in the browser.

Start learning freeBrowse the 22 lessons

Every lesson is free. No sign-up, no install.

22
lessons
3
DB engines
0
setup needed
PostgreSQL
SQLite
NoSQL
JavaScript
Python
Schema Designer
Progress Tracking
22 Lessons
Zero Setup
PostgreSQL
SQLite
NoSQL
JavaScript
Python
Schema Designer
Progress Tracking
22 Lessons
Zero Setup

Everything to learn databases

A complete environment — from first query to production-ready schema design.

Browser-Native Engines

Real PostgreSQL (via PGlite) and SQLite compiled to WebAssembly, plus a MongoDB-style document store. Nothing to install.

22 Guided Lessons

Start by solving a murder mystery in SQL, then work through joins, schema design, window functions and document databases.

Live SQL Playground

Write, run, and iterate on queries with instant feedback. Save queries and track history.

Progress Dashboard

XP, streaks, achievements and completion tracking to keep you motivated every session.

Schema Designer

Visual drag-and-drop schema builder that generates DDL SQL — learn by designing real schemas.

Code Playground

Write and run JavaScript & Python directly in the browser.

Ready to level up?

Start free — no credit card, no install. Open the app and run your first query in under 30 seconds.

Start Learning Free