Learn SQL with our interactive SQL course and unlimited sandbox

The interactive SQL Course of SQL Campus offers short and focused lessons with instant feedback. Practice as much as you like. Everything runs in your browser.

SQL Campus interactive SQL course hero image

Trusted by learners worldwide

We value every learner and use your feedback to keep improving the SQL course and the platform. Read reviews or share your experience on Trustpilot.

“Clear lessons with multiple exercises made everything click. I finally understand joins and can explain my work.”
Sara V.
Data Analyst, fintech
“I went from copy pasting queries to writing my own. The instant feedback kept me moving without getting stuck.”
Jonas R.
Product Manager, e-commerce
“Our interns used the SQL course for onboarding. By week two they were pulling their own data confidently.”
Amira H.
Team Lead, marketplace

Learn SQL with results you can see

Write a query and see the answer instantly. Build confidence with interactive exercises, clear examples, and a live results view.

Experience SQL Campus with a free demo SQL Course

Explore a sample of the SQL course. Run queries, review the results, and try multiple exercises that build real skill in minutes.

Choose how you want to learn

Pick the path that fits your goal. Start guided lessons, practice freely, or challenge yourself with puzzles.

01
Guided course

Follow a structured path from fundamentals to real analysis. Every lesson includes multiple exercises with instant feedback so you learn by doing and see clear progress from the first session.

02
Open sandbox

Jump into a clean workspace and try anything. The sandbox is built for quick experiments in the browser with zero setup and zero pressure.

03
Unlimited puzzles

Puzzles are generated on the spot so you never run out. Each challenge is unique, checked instantly, and paired with helpful hints and full solutions to build speed and accuracy over time.

Works in your browser

No setup and no downloads. Open SQL Campus on any device, run exercises with instant feedback, and track your progress as you advance.

SQL Campus interactive SQL course in browser

What you will learn in the SQL Course

A structured SQL course with lessons and multiple exercises in every module. Learn by doing and see results right away.

Query essentials

Learn SELECT, FROM, WHERE, ORDER BY, aliases, and filtering so you can pull exactly the rows and columns you need.

Group and summarize

Use COUNT, SUM, AVG, MIN, MAX with GROUP BY and HAVING to turn raw data into clear summaries.

Combine tables with joins

Write INNER and LEFT joins, handle NULLs, and avoid duplicate rows while answering real questions.

Subqueries and set logic

Use IN, EXISTS, NOT EXISTS, and derived tables to break big problems into readable steps.

Functions and CASE

Transform text, dates, and numbers, and create categories with CASE to express business rules.

Safe data changes

Insert, update, and delete with simple safeguards and checks so you can modify data confidently.

SQL in numbers

Usage, hiring demand, and community scale at a glance.

58.6%

Of developers used SQL this year.

50%

Of data science job ads mention SQL.

674,720+

Questions tagged SQL in the community.

100%

Top four databases rely on SQL.