SQL Challenge
Para desarrolladores
USD 2.99 · Diseñado para iPad. No verificado para macOS.
Feed your brain. Query up.
Learn SQL the way you will actually use it: one query at a time, against a real database, right on your phone.
SQL Challenge is a single path of original questions. Each level hands you a small database and asks for one thing, and you answer with one SELECT. A real SQLite engine ships inside the app and runs your query on the spot — no server, no signal, no waiting.
Then it runs your query again on rows you have never seen. Hard-code what was on the screen and you will hear about it. That is the whole difference between a query that looked right and a query that is right.
Free to start: the opening levels are free, then unlock the full path with a single one-time purchase. No subscription, no ads, no account.
WRITE REAL SQL
• A keyboard built for queries: a clause row for SELECT, FROM, WHERE, JOIN, GROUP BY, ORDER BY and the aggregates, and a toggle that upper-cases keywords while leaving your table and column names exactly as typed
• A schema panel above the editor: every table with its columns, their types, the row counts, and the first rows to look at
• A result sheet that puts your table next to the expected one, so you can see which rows are extra, which are missing, and which column came back under the wrong name
FIVE WORLDS TO QUERY
• Five invented databases, none of them borrowed from a tutorial: an online shop, a school, a library system, an airline and a music service
• Hidden variants of the same schema — an empty table, a tie at the top, a NULL where you assumed a number, a row with nothing to join to — decide whether you answered the question or just the screen
LEARN THE RIGHT WAY
• Three tiers of hints from Tuple, a cyan beaver who is smug about engineering and on your side anyway
• A curated solution once you pass: the obvious query, the better one, and why the difference matters
• One path, no shortcuts, easy to hard: filtering and sorting, then joins, grouping and aggregates, then subqueries and common table expressions
STAY MOTIVATED
• XP, player levels, daily streaks and badges
• Six themes, dark and light
PRIVATE BY DESIGN
• Works fully offline; no account, no tracking — your progress stays on your device
• No ads, ever
Calificaciones y reseñas
- Esta app no ha recibido suficientes calificaciones ni reseñas para mostrar un resumen.
docs/release-notes/1.0.2-en-US.txt
El desarrollador (MUSTAFA GURBUZ) indicó que las prácticas de privacidad de la app pueden incluir el manejo de datos que se describe a continuación. Para obtener más detalles, consulta la política de privacidad del desarrollador .
No se recopilan datos
El desarrollador no recopila ningún dato en esta app.
Accesibilidad
El desarrollador aún no ha indicado cuáles funciones de accesibilidad admite esta app. Obtén detalles
Ficha técnica
- Vendedor
- MUSTAFA GURBUZ
- Tamaño
- 13.8 MB
- Categoría
- Para desarrolladores
- Compatibilidad
Requiere iOS 15.0 o posterior.
- iPhone
Requiere iOS 15.0 o posterior. - iPad
Requiere iPadOS 15.0 o posterior. - iPod touch
Requiere iOS 15.0 o posterior. - Mac
Requiere macOS 12.0 o posterior y una Mac con el chip M1 de Apple o posterior. - Apple Vision
Requiere visionOS 1.0 o posterior.
- iPhone
- Idiomas
- Inglés
- Edad
4+
- 4+
- Copyright
- © 2026 Mustafa Gürbüz
