Welcome to SQLTest.online
Your personal lab for learning and mastering SQL!
About the team and our quality standards
SQLTest.online is a free online trainer for learning and practicing SQL. The platform provides interactive tasks on real databases, helps you track learning progress, and prepare for technical interviews. The site is built by specialists who work with data every day: SQL trainers, data analysts, and backend developers with hands-on experience in query optimization and database schema design.
We created the platform to make practical SQL training accessible, realistic, and measurable. Today, the library contains 398+ practice tasks designed to help learners move from syntax basics to production-style problem solving.
How we build each task:
- Real-world framing
Scenarios are inspired by analytics, reporting, and application development workflows. - Multi-engine validation
Queries are verified against real database engines used in industry (for example MySQL, PostgreSQL, MS SQL Server, and Firebird). - Progressive difficulty
Task sets are structured from fundamentals to advanced topics such as joins, window functions, and performance-aware querying. - Continuous review loop
We monitor user feedback and update tasks, expected answers, and explanations to keep content accurate.
Public profiles and project identity:
- LinkedIn: SQLTest on LinkedIn
- GitHub: SQLTest source repository
Want to learn Structured Query Language
to confidently work with data?
to confidently work with data?
Or maybe you are an experienced developer
looking to expand your knowledge and prepare for tough technical interviews?
looking to expand your knowledge and prepare for tough technical interviews?
SQLTest.online is the perfect place for you!
Start training →
What will you get?
- Solid SQL knowledge
Understand the basics of the language and learn to write efficient queries. - Practical skills
Gain experience working with real data. - Confidence
Successfully solving tasks will boost your self-esteem and prepare you for any SQL challenges.
Who is SQLTest.online for?
Students
Learn SQL as part of your curriculum or for self-study.
Developers
Improve your skills for working with databases in projects.
Data Analysts
Gain practical experience working with SQL for data analysis.
How to start?
1. Visit the website
Go to SQLTest.online and select the "Tasks" section
2. Select a category
Choose the topic or difficulty level that interests you
3. Solve tasks
Apply your SQL knowledge to solve the given tasks
Why choose us?
- Interactive learning
Solve various SQL tasks directly in the browser. No need to install additional programs or set up an environment. - Variety of databases
Practice on popular databases such as MySQL, PostgreSQL, MS SQL Server, and Firebird. - Constant updates
We regularly add new tasks so you always find interesting challenges. - Detailed statistics
Track your progress, analyze mistakes, and improve your results. - Community
Interact with other users, share experiences, and get help.
Frequently asked questions
What is SQLTest.online and who builds it?
SQLTest.online is an interactive platform for learning and practicing SQL. It is built by contributors with practical experience in SQL training, backend engineering, and data workflows.
How can I practice SQL online with real database engines?
You can solve SQL tasks directly in the browser. Exercises are validated on real engines such as MySQL, PostgreSQL, MS SQL Server, and Firebird.
How many SQL exercises are available for beginners and intermediate learners?
The platform currently offers 398+ practical SQL exercises organized by topic and difficulty, from fundamentals to advanced query patterns.
Can SQLTest.online help with SQL interview preparation?
Yes. Task sets cover joins, aggregations, subqueries, window functions, and other topics commonly asked in SQL technical interviews.
Where can I verify that SQLTest.online is a real project?
You can verify project identity through public profiles on LinkedIn and GitHub, with additional community presence in Telegram.
Telegram
Linkedin