Learn programming with code examples for and SQL. Access solutions for substring extraction, method declaration, database queries, table joins, data sorting, and SQL Server data types. Find ready-to-use code from books and trusted online sources.
by Fedor Obraztsov★ 4.783 ratingsDeveloper ToolsFreeData updated 2026-09-12
Learn maritime with interactive quizzes and detailed flag information. Test knowledge with randomized questions. View Morse code signals using the phone’s flashlight. Track progress and identify areas for improvement through analytics.
Explore augmented posters with interactive video, audio, and buttons. View existing posters built on the platform. Create custom posters using a drag-and-drop editor without coding. Share and access example posters via the provided website.
Learn CNC programming by simulating operations. Input G-code to machine parts. Rotate and zoom 3D models. Adjust tool paths and monitor machining processes. View detailed machine components and their functions.
Write and test code directly on iOS devices. Edit, compile, and run code snippets. Access documentation and syntax hints. Debug and view output in real time. Sync projects across devices.
Learn with 200 structured topics and 3000 annotated audio examples. Practice sentence structure and pronunciation. Track progress and review exercises for accuracy and retention.