Education
SQL Murder Mystery is a free, browser-based game from Northwestern University's KnightLab where you solve a murder case entirely through SQL queries. You start with a crime scene report and work through a real relational database — joining tables, filtering records, and aggregating data — to track down the killer. It's one of the most effective ways to learn SQL because it replaces drills with a compelling narrative. No setup required: everything runs in the browser with an embedded SQLite database. Great for absolute beginners and a fun refresher for developers who want to sharpen their query skills.