Master SQL by practicing
on real databases.

QueryLab is a minimalist SQL playground designed for learning, experimentation, and mastery. Connect instantly without configuration.

Start practicing View demo

QueryLab · Workspace

1SELECT c.name AS category,

2 SUM(p.amount) AS revenue

3FROM category c

4JOIN film_category fc ON c.category_id = fc.category_id

5JOIN inventory i ON fc.film_id = i.film_id

6JOIN rental r ON i.inventory_id = r.inventory_id

7JOIN payment p ON r.rental_id = p.rental_id

8GROUP BY c.name

9ORDER BY revenue DESC

10LIMIT 3;

Results (12ms)

category	revenue
Sports	5314.21
Sci-Fi	4756.98
Animation	4656.30

Precision engineered.

We stripped away the complexity of traditional database clients to give you a pure, uninterrupted coding experience.

Zero Configuration

No connection strings, no Docker containers. The Sakila database is instantly available the moment you open the editor.

Pro-Grade Editor

Contextual AI Assistant

Sign in to unlock our AI model that deeply understands your schema. It explains joins, generates boilerplate, and helps debug syntax errors instantly.

User: How do I join film and actor?
AI: You need the film_actor mapping table.


                            SELECT * FROM film f

                            JOIN film_actor fa ON ...

Master SQL by practicingon real databases.

Precision engineered.

Zero Configuration

Pro-Grade Editor

Contextual AI Assistant

Start writing SQL.

Master SQL by practicing
on real databases.