SQL Practice & Query : queri
Learn SELECT & JOIN Offline
Free · In-App Purchases
Start free: the first module and 8 lessons cost nothing. Write real queries, run them on a real SQLite database on your phone, and get hints aimed at your exact mistake.
Type SQL. Run it. See real rows.
queri is a SQL course where every single lesson ends with a query you write yourself and run against a real database sitting on your phone. No signup. No internet needed. No copying answers off a video.
WHY THIS IS DIFFERENT
Most SQL apps ask you to pick A, B, C or D. You can pass a multiple-choice test on JOINs and still freeze the first time you face a real table. queri never asks you to recognise SQL — it asks you to write it, then runs what you wrote and checks the rows that came back.
HOW A LESSON WORKS
1. A short, plain-English explanation of one idea. No walls of theory.
2. A real task on a real dataset: "list every customer in New York".
3. You type the query. You run it. You see the actual rows.
4. queri compares your result to the correct one and tells you what is off.
5. Stuck? A hint that points at your specific mistake, not a generic nudge.
WHAT YOU WILL LEARN
- SELECT: pull columns out of a table
- WHERE: filter with AND, OR, BETWEEN, IN, LIKE and NULL
- ORDER BY and LIMIT: sort and slice
- COUNT, SUM, AVG, MIN, MAX: aggregate a column
- GROUP BY: aggregate per group
- JOIN: combine tables, including three-table joins
- A capstone: revenue per customer, written from scratch
THE DATASET IS REAL
You work against a small online-shop database: customers, products, orders and order items, with real rows, real nulls and real messiness. Not three toy rows. The schema is one tap away while you write.
WORKS ANYWHERE
Everything runs on your device with SQLite. On the metro, on a plane, on a dead connection. There is no account to create. Only the optional AI Tutor goes online, to answer your question.
BUILT FOR A PHONE
A SQL key row with the characters you actually need. Results in a table you can scroll sideways. Progress and streak saved locally.
SIX LANGUAGES
English, French, Arabic with full right-to-left support, Spanish, Italian and Portuguese.
FREE AND PRO
The first module and the first eight lessons are free. That is enough to know whether this works for you. The free plan includes 10 query runs and 3 AI Tutor questions a day; a short video adds more. queri Pro unlocks the full curriculum and removes every limit.
SQL is the one technical skill that outlasts every framework. Learn it by writing it.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Terms of Service: https://queri.omzor.com/terms.html
Privacy Policy: https://queri.omzor.com/privacy.html
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
• SQL Arcade: Reverse Query, Bug Hunter, Syntax Scramble and more SQL puzzles
• AI Tutor: ask for a hint or an explanation while you practise
• Optional daily reminder to keep your streak going
• New language: Chinese (Simplified)
• Free plan: 10 query runs and 3 AI Tutor questions a day (watch a short video for more). Pro removes every limit
The developer, Mohamed OMARI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Size
- 59.9 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Monthy 5,99 €
- Lifetime 44,99 €
- Provider
Mohamed OMARI
- Mohamed OMARI has not identified itself as a trader for this app. If you are a consumer in the European Economic Area, consumer rights do not apply to agreements between you and the provider.
- Copyright
- © Omzor Creations