# Database Query Logic — Practice SQL Offline

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

- Source: https://appshunter.io/ios/app/database-query-logic/id6774180202 (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/database-query-logic/id6774180202/reviews.md

## What is Database Query Logic?

Database Query Logic is an independent study app for building confidence with query reasoning, SQL behavior, joins, filters, aggregation, NULL handling, subqueries, indexes, transactions, and edge cases.

Designed for beginners, students, developers, analysts, and interview candidates, it turns 160 focused questions into repeatable practice across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts.

- FSRS spaced-repetition intervals
- Weak-point heatmap to spot gaps
- Daily challenge for steady progress
- Mock exams for timed review
- Explanation included with every question
- Offline practice for study anywhere
- No account or login required

Practice offline, no login required. Your study flow is built for private, independent preparation.

Independent study app for Database Query Logic 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.*