---
title: "Database Keys and Constraints - Reviews, Revenue and Downloads in Brunei | Apple App Store"
description: "Database Keys and Constraints is an independent study app for learners who want focused practice on relational database design rules, SQL integrity concepts, and exam-style reasoning.  Use it to revie"
---

# Database Keys and Constraints — Brunei
> Practice SQL Rules Daily

![Database Keys and Constraints App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/42/92/d4/4292d4ed-7363-49bc-c0be-e3db160c214a/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [AFTW](https://apptail.io/developer/aftw-mgtqVb)
**Category:** Education
**Rating:** N/A (0 ratings)
**Price:** Free
**Bundle ID:** com.quizfactory.global.databasekeysandconstrain
**Store:** Apple App Store
**Country:** Brunei
**Version:** 1.0 (released 2026-05-29)
**Original Release:** 2026-05-30
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/bn/app/app/id6773622183)
**AppTail Page:** [https://apptail.io/app/database-keys-and-constraints-MQaA/brunei](https://apptail.io/app/database-keys-and-constraints-MQaA/brunei)

## Database Keys and Constraints Description
Database Keys and Constraints is an independent study app for learners who want focused practice on relational database design rules, SQL integrity concepts, and exam-style reasoning.

Use it to review fundamentals, build practical skills, avoid common pitfalls, and explore advanced concepts across 160 questions. Every question includes an explanation, so you can learn why an answer is right and where mistakes usually happen.

Features:
- 160 questions on keys, constraints, relationships, and design logic
- Spaced repetition using FSRS intervals
- Weak-point heatmap to target fragile areas
- Daily challenge for steady review
- Mock exams for timed practice
- Clear explanations for every question
- Offline practice, no login required

Built for students, interview preparation, database course review, and anyone strengthening SQL schema design knowledge.

Independent study app for Database Keys and Constraints practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners.

Practice offline, no login required.

## Database Keys and Constraints Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/bf/59/48/bf59484e-e8f1-4427-4d24-4ae3298500a7/01-home.png/2048x2732.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ef/98/22/ef9822fa-2459-c193-62a8-711b4f9519ce/02-practice.png/2048x2732.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/8f/6e/3b/8f6e3bc7-e131-4759-7ff6-b9893f09528f/03-exam.png/2048x2732.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/1e/eb/93/1eeb9361-2cdd-6e6b-fe56-0d02146c0e7e/04-review.png/2048x2732.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/b7/92/f2/b792f2d6-9c3d-0748-c3f0-97e481208d00/05-stats.png/2048x2732.png)







## Database Keys and Constraints Available In
- [United Arab Emirates](https://apptail.io/app/database-keys-and-constraints-MQaA/united-arab-emirates)
- [Brunei](https://apptail.io/app/database-keys-and-constraints-MQaA/brunei)
- [Canada](https://apptail.io/app/database-keys-and-constraints-MQaA/canada)
- [Israel](https://apptail.io/app/database-keys-and-constraints-MQaA/israel)
- [Russia](https://apptail.io/app/database-keys-and-constraints-MQaA/russia)

---

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