# Query Optimization Concepts — Practice Offline Daily

> Practice Offline Daily (iPhone/iPad app by Tsuyoshi Sezaki.)

- Source: https://appshunter.io/ios/app/query-optimization-concepts/id6773823412 (this page in markdown: same URL + `.md`)
- Developer: [Tsuyoshi Sezaki](https://appshunter.io/developer/1886356149)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 38 MB
- Languages: American English
- Released: 2026-06-03
- Data updated: 2026-06-12
- User reviews in markdown: https://appshunter.io/ios/app/query-optimization-concepts/id6773823412/reviews.md

## What is Query Optimization Concepts?

Query Optimization Concepts is an independent study app for learners who want focused practice on database query planning, cost models, indexes, joins, execution plans, and optimizer behavior.

Built for students, developers, data engineers, interview candidates, and anyone reviewing core optimization ideas, the app turns a complex topic into repeatable daily practice.

- 160 practice questions across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts
- Every question includes an explanation to help you understand the reasoning
- FSRS spaced-repetition intervals to review at the right time
- Weak-point heatmap to spot topics that need more attention
- Daily challenge for steady review habits
- Mock exams for timed, exam-style practice
- Offline practice with no login required

Practice offline, no login required. Your study flow is designed to work without an account.

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


## Version history (last 1 release)

### 1.0 — 2026-06-03

No release notes.

## More apps by Tsuyoshi Sezaki

- [危険物乙4 合格ドリル](https://appshunter.io/ios/app/4/id6761160536)
- [英語2級レベル対策ドリル](https://appshunter.io/ios/app/2/id6761160574)
- [Excel操作検定対策ドリル](https://appshunter.io/ios/app/excel/id6761160609)
- [ビジネス英語テスト対策ドリル](https://appshunter.io/ios/app/id6761160666)
- [情報セキュマネ 合格ドリル](https://appshunter.io/ios/app/id6761160709)
- [運転免許 合格ドリル](https://appshunter.io/ios/app/id6761160841)

All apps by Tsuyoshi Sezaki: https://appshunter.io/developer/1886356149

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-12.*