SQL Code Play: Learn SQL
教育
免費 · App 內購買 · 專為 iPad 設計。尚未針對 macOS 驗證。
Turn a SQL example into something you can explore. SQL Code Play gives you a local query workspace, guided lessons and focused challenges in one app. Read how a statement works, run it against sample tables and change it to see how the answer changes.
A workspace for hands-on learning
The Code and Output tabs keep the statement and its result close together. Edit your query, tap Run and examine the returned table. Row and column counts provide context, NULL values are marked, and messages distinguish an empty result from a completed statement or a query error. Undo and redo help you work through changes in the editor.
You can begin with the supplied database instead of building sample data first. Employee, meeting and room records provide material for filtering, grouping and joining tables. The database list displays table names and record counts. Tapping a table loads a SELECT statement so you can inspect the data and decide what to try next. Restore lets you rebuild the sample database after experiments.
Lessons that connect reading with doing
Search the tutorial collection or filter it by fundamentals, filtering, analysis and advanced topics. Lesson details explain the purpose of an example, describe its logic and offer practice tips. Send the example to SQL Workspace, modify it and review the output. Local viewed and practiced indicators help you distinguish topics you have read from examples you have tried.
Work through selection, conditions, ordering and aliases, then explore joins, aggregate functions and grouped summaries. Examples also cover creating tables, changing records, constraints, subqueries and transactions. When you are ready to go further, investigate common table expressions, window functions, date calculations and JSON operations. You can return to a specific topic whenever you need a reminder.
Three ways to practise
SQL Lab offers a sequence of query templates that open directly in the workspace. Explore tasks such as ranking salaries, summarising departments, finding duplicates and selecting high-value products. The templates give you a statement to study and adapt.
Choose the Best Answer turns SQL syntax into focused multiple-choice questions. Select the missing piece, check your answer and consult a hint or explanation when you need help. Fill in the Blanks asks you to complete queries with the correct tokens, reinforcing the placement of keywords, operators and clauses. Challenge progress is kept locally, and the activities show the levels or missions available to you.
Use the learning path that fits your session
Begin with a tutorial if a concept is new. Choose a short challenge to review a detail. Open a lab template when you want to spend more time exploring a query. This combination suits students learning databases, people starting SQL and developers revisiting familiar syntax.
The core query workspace and bundled lessons run locally without a cloud database account. Online services such as ads, purchases and support links may require connectivity. Practice database changes are for learning; Restore resets the sample data. Select system, light or dark appearance from Settings to match your preferred reading environment.
The app contains advertising and offers an optional subscription to remove ads. Build your understanding through a simple cycle: read the explanation, edit the statement, run it and inspect the result.
Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
評分與評論
- 此App未收到足夠的評分或評論以顯示概況。
Minor bug fixes and performance improvements.
Updated the SQL compiler for better query compatibility.
Added support for CREATE TABLE and a wider range of SQL queries.
開發者Merbin Joe表明App的私隱慣例或包括下列資料的處理。詳情請參閲 開發者的私隱政策 。
用於追蹤你的資料
以下資料可能會用於追蹤你在其他公司的 App 和網站的活動：
- 使用資料
不會與你連結的資料
開發者可能會收集以下資料，但不會連結你的個人身份：
- 使用資料
輔助使用
開發者表示，此 App 無法支援某些輔助使用功能。 進一步了解 輔助使用功能。
資料
- 供應商
- Merbin Joe
- 大小
- 51.1 MB
- 類別
- 教育
- 相容性
須使用 iOS 15.0 或以上版本。
- iPhone
須使用 iOS 15.0 或以上版本。 - iPad
須使用 iPadOS 15.0 或以上版本。 - iPod touch
須使用 iOS 15.0 或以上版本。 - Mac
須使用 macOS 12.0 或以上版本及配備 Apple M1 或以上版本晶片的 Mac。 - Apple Vision
須使用 visionOS 1.0 或以上版本。
- iPhone
- 語言
- 英文
- 年齡分級
4+
- 4+
- 包含
廣告
- App 內購買
是
- 1 Month Ad-Free HK$ 8.00
- Six Month Ad-Free HK$ 22.00
- 1 Year No Ads Access HK$ 38.00
- 版權
- © Codeplay