MintQuery: Learn SQL

Learn SQL in five minutes a day, on your phone. Every lesson teaches one idea and shows the query working one row at a time. Then you practice it straight away: tap the blocks, or type the query yourself.

Every day there’s also one real SQL interview question, from companies like Airbnb and Amazon. Free for everyone.

TWO COURSES

SQL Fundamentals: nine modules, from your first SELECT to window functions
Real-World SQL (new): six modules on the messy data you meet at work, like duplicates, missing values, messy text, and joins that count things twice

WHAT YOU’LL LEARN

SELECT, FROM, WHERE: the building blocks of every SQL query
Filtering, sorting, and grouping data
JOINs: combining data from multiple tables
Aggregate functions like COUNT, SUM, AVG
CASE, subqueries, date functions, and window functions
Spotting the traps in real data before your numbers go wrong

FEATURES

A daily SQL interview question from real companies
8 exercise types, including fill-in-the-blank, query builder, and debug challenges
Type your answer or tap the blocks; typed answers are checked by their result
AI tutor that explains concepts and gives hints without giving away the answer
Practice rounds that bring back the questions you missed, from both courses
Streaks and badges: lessons and the daily question both count
A shareable certificate for each course you finish
Progress saved across devices: iPhone, Android, and the web

WHO IT’S FOR
MintQuery is for beginners learning SQL for the first time, career switchers moving into data analytics, analysts refreshing skills they haven’t used in a while, and anyone preparing for SQL interview questions. Practice writing queries, filtering data, joining tables, and debugging SQL, all from your phone, no laptop required.

WHY MINTQUERY

No hearts, no energy timers, no ads, no waiting hours to continue a lesson. Make mistakes freely: that’s how you learn.

MintQuery is free to use, including the daily question, the first three modules of SQL Fundamentals and the first two of Real-World SQL. Premium unlocks every module of both courses and unlimited AI tutor help, available as a monthly or annual auto-renewing subscription.

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