SQL Practice: Learn Database

Marton Greber

About this app

Learn SQL in 15-minute daily sessions — on your phone, anywhere.

SQL Practice turns idle moments into practical data-skills training. With interactive exercises, real-world datasets, and instant feedback, you’ll build SQL confidence from beginner basics to interview-ready skills — right on your phone.

Who it’s for:
- Career changers entering tech
- Professionals adding SQL to their toolkit
- Students prepping for technical interviews
- Anyone curious about data and databases

Why it’s different:
- Real data: practice on realistic scenarios
- Progressive curriculum: start simple, build toward complex queries
- Mobile-first design: learn anywhere, anytime
- Understand mistakes and improve fast
- Gamified progress: streaks, XP, and achievements to stay consistent

What you’ll master:
- SELECT, WHERE, and filtering
- JOINs and relational queries
- Aggregations (COUNT, SUM, AVG…)
- Subqueries and advanced techniques
- Core database design concepts

Stay engaged:
- Daily practice challenges
- Targeted drills by topic
- Hardcore mode for power users
- Detailed progress stats
- Achievements

Start your data journey today — no prior coding experience required, just 15 minutes of curiosity.

Privacy Policy: https://martongreber.github.io/mvp/privacy.html
Terms of Use: https://martongreber.github.io/mvp/terms.html

Ratings and reviews

was going good for the first couple exercises, and then we got to the "and (logical operator)," and I think they left out the logical part because none of them made any sense. These SQL apps are terrible. "Return books at cost at least 100 and at most 500" highlight at most. table consists of 300, 500, 1500. result expected is only the 300? the 500 should be included, too. The one before that is messed up, too.

Started off great, but the questions do not always align with the correct answer. 1. Sometimes my answer is exactly the same as the expected result and it still says I'm wrong. 2. It will pick up my answer as wrong because my column title is different even though it was never specified as part of the question. 3. Has marked me correct for some when my order is different even though this time it was part of the question. Minor but frustrating.

No certificates! but it was Completely Free! very effective for beginners! I recommend this to learners those who always use chatbots to learn; even though u have completed the course , u still have the unlimited debugging and practise questions from simple to hard; And it has the streak motive to make the learners consistent; and solve a 5 prblms daily, or learn a lesson to keep streak

What's new

This update includes bug fixes, small performance improvements, and new tweaks to keep your daily SQL practice more engaging!