SQLBook.io is a browser-based SQL practice platform that gives you instant access to your own MySQL, PostgreSQL, MariaDB, or Oracle sandbox—no installation or setup required.
We built SQLBook to solve a common problem: learning SQL shouldn't require wrestling with database installations, configuration files, or environment issues. Whether you're a student taking your first database course, a bootcamp participant learning data skills, or a professional brushing up before an interview, you deserve a tool that lets you focus on writing queries, not troubleshooting setup.
Students and Learners
Taking a database course at a community college, university, or online? SQLBook eliminates the setup headaches so you can start practicing immediately. Your instructor assigns a query exercise, and you're running it within seconds—not hours.
Coding Bootcamp Participants
Bootcamp schedules are intense. Every minute counts. SQLBook lets you jump straight into SQL practice without eating into valuable learning time with installation issues.
Self-Taught Developers
Learning SQL on your own? Practice on real database engines used in production environments. Write queries against MySQL one day, PostgreSQL the next—all from your browser.
Interview Candidates
Preparing for a technical interview? Practice SQL problems on the exact database engine your target company uses. Build confidence with real syntax, not simulated environments.
Educators and Instructors
Teaching a database course? Stop spending class time on "why won't MySQL install on my laptop" and start teaching actual SQL concepts. Your students get identical environments, and you get to focus on curriculum.
Practice on the databases actually used in industry:
| Database | Version |
|---|---|
| MySQL | 8.4.0 |
| PostgreSQL | 17 |
| MariaDB | 11.5.2 |
| Oracle | 21c Express Edition |
Most SQL practice tools support one or two databases. SQLBook gives you access to four major engines so you can learn the syntax differences and choose the right tool for each job.
No downloads. No installations. No configuration. No "works on my machine" problems.
Open your browser, select your database engine, and start writing queries. Your sandbox is ready in seconds with real database functionality—not a simplified simulator.
Every user gets their own database environment. Create tables, insert data, run complex queries—it's your space to experiment without affecting anyone else. Make mistakes freely. That's how learning happens.
Visualize your database structure with automatically generated ERD diagrams. See how your tables relate to each other, understand foreign key relationships, and design better schemas.
Save your work and come back to it later. Build up practice datasets over time. Your queries and data structures persist between sessions so you can tackle increasingly complex problems.
SQLBook is currently completely free with no restrictions. We're focused on building a tool that genuinely helps people learn SQL effectively.
Here's what we believe:
Real databases matter. Simulators and simplified environments teach you pseudo-SQL. We give you actual MySQL, PostgreSQL, MariaDB, and Oracle instances because that's what you'll use in the real world.
Setup friction kills learning momentum. When you're motivated to practice, you should be able to start immediately. Not after an hour of troubleshooting PATH variables.
Different databases serve different purposes. MySQL dominates web applications. PostgreSQL excels at complex queries and data integrity. Oracle powers enterprise systems. Learning to work with multiple engines makes you more versatile.
Practice should be accessible. Whether you're a student in rural Massachusetts or a career changer in Mumbai, you should have access to professional database tools.
SQLBook offers institutional licensing for coding bootcamps, community colleges, and universities. Your students get premium features at bulk pricing, and you get:
Interested in SQLBook for your school or bootcamp? Contact us at admin@sqlbook.io to discuss institutional access.
We're actively developing SQLBook based on user feedback. Some features on our roadmap:
Have a feature request? We'd love to hear it. Reach out at admin@sqlbook.io.
The best way to support SQLBook right now:
Share your experience. If SQLBook helped you learn SQL, tell others. Post about it, recommend it to classmates, mention it in your bootcamp Slack channel.
Give us feedback. What's working? What's frustrating? What feature would make your learning easier? Your input directly shapes what we build next.
Contribute content. Have a great SQL tip or tutorial idea? We're always looking for helpful content to share with the community.
SQLBook runs on high-performance infrastructure with NVMe storage, ensuring your queries execute quickly and your sandbox environments respond instantly. Each database instance is containerized and isolated, providing security and consistent performance.
Your data is your data. Workspaces default to private. You control what you create and what you share.
Questions about SQLBook? Want to provide feedback? Interested in institutional licensing?
Email: admin@sqlbook.io
We read every message and typically respond within 24-48 hours.
SQLBook exists to make SQL education more accessible and effective. We believe that anyone who wants to learn database skills should have access to professional tools, regardless of their technical setup or computing resources.
Start practicing today. Your sandbox is waiting.