Real execution, every lesson
Each lesson ends with you typing SQL and running it against a real on-device SQLite database. If it can't be executed and graded, it isn't a queri lesson.
Every lesson runs on a real database
Learn SQL
by doing.
Every lesson is a real query you run against a real database — on your phone. No signup. Works fully offline. Type SQL, run it, see real rows.
SELECT name, city
FROM customers
WHERE city IN ('London', 'Paris', 'Tokyo');
Run
rows in 38 ms
| name | city |
|---|---|
| Oliver Bennett | London |
| Camille Moreau | Paris |
| Kenji Sato | Tokyo |
Nice — that's the WHERE clause done.
Features
Not a quiz. Not a bare editor.
Most SQL apps make you choose: multiple-choice questions with no real database, or a bare editor with no curriculum. queri is both halves at once.
Auto-graded, with real hints
Your result set is compared to the correct answer, not your query text. A wrong answer gets a hint that names the actual mistake — never just "try again".
Fully offline
The database ships on your device. No account, no server round-trip in the core loop — SQL runs and lessons grade with the phone in airplane mode.
Streaks, XP and real progress
Levels, badges and a daily streak track what you've actually done. Nothing is invented — every number you see is one you produced.
English, French, Arabic, Spanish
Full right-to-left support for Arabic, with the SQL editor staying left-to-right and usable — because SQL syntax doesn't mirror.
8 lessons, genuinely free
The free tier isn't a crippled trial. Eight complete lessons, real execution, real grading, no time limit and no ads — permanently free.
How it works
The loop, every lesson
Read the concept, write the query, run it, see what actually happens. Repeat.
1
Read a short concept
One idea at a time — a clause, a keyword, a pattern. No lecture, just enough to try it.
2
Type the query
A real SQL editor built for a phone keyboard, with a key row for the characters SQL actually needs.
3
Run it and see
Real rows come back from a real database. Right or wrong, you see exactly what your query produced.
Free head, one Pro upgrade
Lessons 1–8 are free forever — no trial clock, nothing expires. Pro unlocks the rest of the course, one upgrade, choose the plan that fits.
WeeklyAndroid
MonthlyiOS & Android
AnnualBest value
LifetimeAndroid, one-time