Free SQL Course & SQL Practice Online

Free interactive SQL course

Learn SQL by writing real queries.

QueryCraft SQL is a free, practical SQL course for beginners and refreshers. Practice SQL online free with checked exercises, hints, answer review, exams, and one consistent training database.

Start learning SQL

View curriculum

GreenCart query

checked

SELECT c.customer_name, SUM(oi.quantity * oi.unit_price) AS revenue FROM customers c JOIN orders o ON o.customer_id = c.customer_id JOIN order_items oi ON oi.order_id = o.order_id GROUP BY c.customer_name ORDER BY revenue DESC;

Correct. 8 rows returned.

Why QueryCraft SQL

Built for free SQL practice, not passive reading

Beginner-friendly lessons

Start from database foundations, then build toward real reporting, joins, subqueries, and data-change workflows.

SQL exercises with answers

Run real queries, get result-based feedback, use hints, and review a correct answer with an explanation when you get stuck.

Course-wide schema

The GreenCart database stays consistent so learners build fluency instead of relearning toy tables.

Exams and progress

Module exams, a final exam, mistakes review, and cloud progress are designed for serious learning.

What you can do here

Free SQL learning for common goals

Learn SQL from scratch

Start with beginner SQL concepts like tables, rows, columns, SELECT, WHERE, sorting, and result sets.

Practice SQL online

Write and check SQL in a browser with no local database installation or setup.

Work through SQL exercises with answers

Use hints first, then compare your query with a complete solution and explanation when you need help.

Build a daily SQL habit

Use short daily SQL practice sets to keep SELECT, joins, GROUP BY, and reporting patterns active.

Course schema

One realistic database across the course

customers

orders

order_items

products

payments

reviews

The full schema includes hubs, neighborhoods, customers, staff, suppliers, categories, products, inventory, promotions, orders, order items, payments, deliveries, reviews, and support tickets.

Common questions

Free SQL learning that still feels practical

Can I learn SQL for free with QueryCraft SQL?

Yes. QueryCraft SQL is a free practical starting point for learning SQL, with beginner lessons, checked SQL exercises, a SQL sandbox, and a Daily SQL Challenge.

Can I practice SQL online without installing anything?

Yes. QueryCraft runs in the browser, so you can write and check SQL online without installing a database or editor.

Does QueryCraft include SQL exercises with answers?

Yes. Exercises provide hints, checked query results, a complete answer, and an explanation so you can understand the solution rather than only see a score.

Ready to write your next SQL query?

Start as a guest or sign in to save progress and Daily Challenge tokens.

Open the learning app