SQLCrab is a browser tool for SQL interview practice, whose core feature is running exercises on a real Postgres engine, so users do not need to set up their own server or install and configure an environment.
Purpose: The platform is used to practice real SQL interview questions and is suitable for users preparing for interviews for data-related positions and hoping to improve their SQL query skills.
Main capabilities: According to the official description, the platform provides free tutorials, concept cards, a sandbox, and graded labs. Users can write and execute SQL directly in the browser and get immediate results based on a real Postgres engine.
How to use: No server or installation steps are required; it can be used by opening a browser. Learn concepts through tutorials and concept cards, freely try queries in the sandbox, and then test yourself through graded labs.
Use cases: SQL interview preparation, self-study and reinforcement of SQL skills, and query practice in a real database environment.
Limitations: The available information only states that it is free and can be used in a browser. Information such as the range of supported SQL features, number of questions, account requirements, data persistence, and advanced paid content is not yet provided.
