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SQLtest up your SQL skills

Harness the power of practice to master SQL. Our interactive exercises are designed to solidify your understanding, from foundational concepts to advanced techniques. Whether you're a SQL novice or a seasoned pro, you’ll find challenges tailored to your skill level. Boost your confidence for job interviews and real-world applications through consistent practice.
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Welcome to SQLTest.online

SQLTest.online is an interactive learning platform that helps you build practical, real-world SQL and database skills. The best way to learn is by solving real problems, so we give you hands-on tasks and instant feedback.

Our motto: Master SQL — one query at a time.

How it works

Our question database contains 365 tasks ranging from simple SELECT queries to complex analytical problems that mirror real-world scenarios. Tasks are grouped by difficulty, topic, and the database used.

Each problem includes tests that validate your query results and any task-specific conditions.

Getting started

📂

Choose a challenge

Explore by topic or difficulty level.

✍️

Write your query

Use the built-in editor to craft your solution.

✅

Run and iterate

Get instant feedback and improve your query until it passes the tests.

Login is optional

You can start solving challenges immediately without creating an account. Signing in is not required, but it unlocks features such as saving progress, earning and storing achievements, and viewing others solutions. We recommend signing in for the full experience.

Benefits for logged‑in users

  • Save your progress and resume challenges anytime
  • Earn and display achievements as you learn
  • Track your personal learning history and stats
  • View and compare solutions from other users

View other users solutions

After you correctly solve a challenge you will be able to view solutions submitted by other users. Comparing different approaches is one of the fastest ways to learn new techniques and optimize your queries. (Viewing solutions is available to logged‑in users only.)

Achievements & progress

Earn achievements as you complete tasks, master topics, and improve efficiency. Achievements and personal progress tracking are saved for logged‑in users so you can build a persistent record of your learning.

Take the SQL Skill Test

When you feel ready, try the test. The test is designed to evaluate your SQL skills through a series of practical challenges. The rank you achieve is not official, but it reflects your proficiency and understanding of SQL concepts.

Quick tips

  • Try multiple approaches — different solutions can have very different performance characteristics.
  • Read the task conditions carefully — some problems require a specific statement or result shape.
  • Use the estimated query cost (when available) to learn about efficiency, but focus on correctness first.

Community

Join our community of learners! All users are welcome to participate in our English-speaking chats on Telegram or WhatsApp to share ideas and ask questions.

Support

If you need help, have feedback, or want to report a problem, email us at support@sqltest.online.

Start practicing