Practice SQL Online: Free Exercises With Answers

Free SQL practice

Practice SQL online with feedback that teaches.

QueryCraft SQL practice tasks ask you to write SQL, run it, compare results, use hints when needed, and review a correct answer when you get stuck. Start in guest mode without installing anything.

Interactive SQL exercises for real skills

The practice system supports SELECT, filters, sorting, joins, aggregation, subqueries, schema inspection, data changes, views, transactions, and performance-oriented queries.

Beginner SQL exercises block unsafe commands where needed. Later modules deliberately introduce safe INSERT, UPDATE, DELETE, CREATE, DROP, and transaction workflows.

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.

Practice topics

SQL exercises that match what people search for

SQL joins practice

Practice INNER JOIN and relationship queries across customers, orders, products, payments, reviews, and deliveries.

SQL GROUP BY practice

Build reporting queries with COUNT, SUM, AVG, HAVING, grouped result sets, and business metrics.

SQL interview practice

Use exams and challenge questions to rehearse the practical skills behind many beginner data analyst SQL questions.

SQL exercises with answers

Hints help you move forward, and answer review shows a complete solution when you need it.

Practice questions

Practice online without losing the learning loop

Is QueryCraft SQL practice free?

Yes. You can start practicing SQL online free, run checked queries, use hints, and review answers in your browser.

Can beginners use these SQL exercises?

Yes. The exercises begin with basic SQL and gradually introduce filters, joins, aggregation, subqueries, data changes, and performance basics.

Do the exercises run real SQL?

Yes. Practice tasks run against the GreenCart training database and compare your returned columns, rows, and query behavior with the task requirements.

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