Best Free Resources and Games for Learning SQL

Learning SQL has become more engaging thanks to interactive platforms and game mechanics. Modern resources offer everything from simple drills to complex quests, allowing you to effectively sharpen your skills without boring theory.

A Game-Based Learning Approach

SQL Protocol is a free network game in the style of "The Matrix," where users progress through levels from simple to complex. The platform allows communication with real players and provides help in chat when difficulties arise. A PvP mode is available for solving tasks at speed.

Practical Drills and Courses

The following resources are suitable for systematic learning:

• Stepik: a free course with no theory, only real tasks and interactive work with databases.
• LeetCode Study Plan SQL 50: a collection of free tasks ranging from beginner to advanced levels.
• Sqltest.Online: a platform with over 370 tasks grouped by difficulty and topics.
• Mode SQL Tutorial: a detailed course with theory, practice in the Mode editor, and an A/B testing simulator.

Additional Materials and Quests

The GitHub repository SQL-Tutorials contains hints, mind maps, and a PDF file with over 800 interview questions. For quest lovers, dbquacks offers 66 levels of varying difficulty. The text-based game SQL Noir invites you to immerse yourself in the role of a detective analyzing clues in a database.