SQL Practice: Learn Database

Marton Greber

In-app purchases

About this app

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

SQL Practice turns idle moments into practical data skills. With interactive exercises, realistic datasets, and instant feedback, you’ll build SQL confidence from beginner fundamentals to interview-ready skills.

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

Why it’s different:
- Learn by doing: write and run real SQL queries
- SQL Patterns (Pro): understand reusable approaches instead of memorizing answers
- Database Bits (Pro): build intuition with short, visual lessons
- Smarter feedback (Pro): see why your result differs from the expected output
- Progressive curriculum: start with the fundamentals and advance at your own pace
- Mobile-first design: practice whenever you have a few spare minutes

When you get stuck:
With Pro, SQL Practice helps you move forward without immediately giving away the answer. Use progressive hints, compare your results with the expected output, and explore SQL X-Ray explanations that break queries into understandable steps.

What you’ll learn:
- SELECT, WHERE, ORDER BY, and filtering
- JOINs and relationships between tables
- COUNT, SUM, AVG, GROUP BY, and HAVING
- Subqueries and advanced query techniques
- Reusable SQL patterns (Pro)
- Core database concepts, indexes, and data design (Pro)

Practice your way:
- Guided SQL lessons
- Easy, medium, and hard exercises
- Quick drills
- Short visual database lessons (Pro)
- Daily practice challenges
- Streaks, XP, achievements, and progress tracking
- Hardcore mode: turn off the advanced SQL keyboard and solve the toughest challenges without assistance—the highest level of SQL practice.

Free and Pro:
Core SQL lessons, exercises, drills, streaks, and basic progress tracking are free.

An optional auto-renewing Pro subscription unlocks SQL Patterns, Database Bits, progressive hints, detailed result comparisons, and SQL X-Ray step-by-step explanations. Available plans, billing periods, trial eligibility, and localized prices are shown before purchase. No purchase is required to use the core learning and practice features.

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.

I would say the app is good overall. It is clear that the app was created by Ai, but no advertising or paid subscriptions are there which is valuable. However, sometimes the materials given are not enough to complete the tasks and most of the tasks have the same pattern. I love the idea, but you definitely need to work on it more and develop it

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.

What’s new

SQL Practice 2.0 is here—our biggest learning update yet!

New with an optional Pro subscription:
- Practice reusable queries with SQL Patterns
- Explore database concepts with visual Database Bits
- Get progressive hints and clearer result comparisons
- Break down queries step by step with SQL X-Ray

Core SQL lessons, exercises, and drills remain free.