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Your first real SQL query takes five minutes.

MintQuery is a mobile app that teaches SQL from zero. Build real queries by tapping or typing, and see the result straight away. Short lessons, no laptop needed, on iPhone, Android and the web.

Try your first query · No account needed · No ads

Two courses, one path

Course 1: SQL Fundamentals

9 modules, from your first SELECT to window functions, in PostgreSQL. Know some already? Take the placement test and skip ahead.

  1. 1. SELECT (free)
  2. 2. WHERE (free)
  3. 3. Aggregations (free)
  4. 4. GROUP BY
  5. 5. JOINs
  6. 6. Subqueries
  7. 7. CASE
  8. 8. Dates
  9. 9. Window functions

Course 2: Real-World SQL

Queries that look right and return the wrong number: rows a join repeats, missing values, messy text, dates. You type the queries yourself.

  1. 1. Duplicates (free)
  2. 2. Missing values (free)
  3. 3. Missing rows
  4. 4. Messy text
  5. 5. Dates
  6. 6. Counting the right thing

Then, real interview questions

A new interview challenge every day, for everyone, from real SQL interviews, in collaboration with StrataScratch. The Interview challenge library keeps past challenges at three levels.

What learners say

The best way to practice SQL on your phone. Great experience so far! Most apps just give you multiple-choice questions, but MintQuery actually has you build, debug, and write queries directly on your phone. The AI hint feature is a lifesaver when you get stuck, without giving away the full answer right away. Very smooth user interface and zero ads.

Tom&jjerry, App Store review, 5 out of 5 stars

A good tool to refresh my memory on SQL fundamentals

Sam B., Google Play review, 5 out of 5 stars

Great app for learning SQL! Simple, interactive, and easy to follow. The hands-on exercises make learning fun and effective.

Ghanshyam K., App Store review, 5 out of 5 stars

Nice App for any Beginner who seeks to learn SQL in an interesting way

Ahmed F., Google Play review, 5 out of 5 stars

Finally, a good place to learn SQL. Beautiful UI.

Happy Potato, Google Play review, 5 out of 5 stars

Questions people ask

I'm not technical. Can I really do this?

Yes. Lesson 1 starts at zero: nothing to install, nothing to know first. Most people write their first real query in about five minutes.

Can I really learn SQL on my phone?

That's the whole idea. Lessons take about five minutes, you build queries by tapping or typing, and every query runs so you see what it does. Waiting for the bus counts.

Is it on iPhone and Android?

Yes, on both: iPhone (App Store), Android (Google Play) and the web at mintquery.app. Sign in with the same account and your lessons, streak and badges carry over between your phone and your computer.

What if I get stuck?

Ask the AI tutor. It explains the idea in plain words and nudges you toward the answer instead of just handing it over.

Is it free?

Modules 1–3 of SQL Fundamentals and 1–2 of Real-World SQL are free forever. No ads, no hearts, no energy bar. Premium unlocks the rest of both courses, the Interview challenge library and unlimited tutor help: $9.99 a month or $79 a year.

Which SQL will I learn?

PostgreSQL, from your first SELECT to window functions. Then Real-World SQL: the traps real data sets, like duplicates from joins, missing values, messy text and dates. Moving to MySQL, SQL Server or BigQuery later is mostly small syntax differences. Already know some? Take the placement test and skip ahead.

Will it help with interviews?

Yes. There's a new interview-style question every day, from real interviews, in collaboration with StrataScratch.

Get the app

App Store · Google Play · Web