Top 15 Websites to Learn SQL for Free in 2025 (Beginner to Advanced)

Structured Query Language (SQL) is one of the most essential skills for data analysis, software engineering, and database management. Whether you’re a beginner or want to advance your data-handling expertise, there are dozens of free online platforms that teach SQL interactively.

In this post, we’ll explore the best 15 websites to learn SQL for free in 2025, including platforms offering paid certificates for advanced learners.

1. SQLBolt

SQLBolt offers a series of interactive lessons and exercises that teach SQL step-by-step. It’s ideal for absolute beginners who want to learn by doing.

Completely free
Browser-based interactive queries
Great for self-paced learners

2. W3Schools SQL

W3Schools SQL provides clear explanations, code samples, and an online SQL editor for practice.

Free SQL tutorials and exercises
Covers MySQL, PostgreSQL, and other variants
Optional paid certificate

3. freeCodeCamp

freeCodeCamp includes SQL tutorials as part of its Data Analysis and Backend Development paths.

100% free and open-source
Includes real-world projects and certifications
Excellent for self-learners and career changers

4. Khan Academy

Khan Academy offers video-based lessons and interactive SQL challenges covering basics to intermediate database concepts.

Free structured courses
Beginner-friendly and engaging
Interactive exercises and quizzes

5. Codecademy

Codecademy’s “Learn SQL” course is one of the most popular for beginners.

Free lessons with hands-on coding
Paid Pro plan for certificates and real projects
Excellent user experience

6. Coursera

Coursera hosts free SQL courses from top universities like Stanford, Duke, and Michigan.

Free to audit (no payment needed)
Paid certificates available
Structured university-level courses

7. Udemy

Udemy features a wide selection of SQL tutorials — both free and paid — from top-rated instructors.

Free beginner courses available
Frequent discounts and promotions
Paid certificate option

8. SQLZoo

SQLZoo offers interactive SQL exercises and real-time query testing to help you learn by practice.

Completely free and open
No registration required
Interactive query interface

9. DataCamp

DataCamp teaches SQL for data science and analytics through structured lessons and hands-on projects.

Free introductory SQL courses
Paid certificates for advanced levels
Practice with real-world datasets

10. edX

edX offers free university-level SQL courses from leading institutions like Harvard and IBM.

Free to audit
Optional verified certificates
High academic quality

11. Udacity

Udacity provides free SQL lessons within its Data Analysis and Programming Nanodegrees.

Professional-level SQL content
Interactive quizzes and projects
Paid Nanodegree certifications

12. HackerRank

HackerRank allows you to practice SQL challenges and compete globally to test your skills.

Completely free
Ranked SQL challenges
Great for interview preparation

13. Stanford University SQL Course

Stanford Online provides a university-level free course that teaches SQL fundamentals and database design.

Free to audit
Academic credibility
Structured and professional

14. TutorialsPoint SQL

TutorialsPoint offers detailed SQL tutorials along with a built-in SQL editor for practical exercises.

Free structured tutorials
Step-by-step examples
Ideal for quick learning

15. LearnSQL.com

LearnSQL.com provides interactive SQL lessons with gamified progress tracking.

Free beginner modules
Paid certification tracks
Clean, modern interface

Conclusion

Learning SQL has never been easier. Start with free platforms like SQLBolt, W3Schools, freeCodeCamp, and HackerRank — then advance to Coursera or DataCamp for certifications. With consistent practice, you’ll be managing and querying databases confidently in no time.