So you think you know SQL? Or maybe you’re just starting out and want to get your hands dirty? Either way, I’ve got you covered with some cool resources to practice your SQL skills.
Easy - Mystery SQL
A murder has been committed, and the only clue is a database. Can you solve the mystery by writing the right SQL queries? Mostly joins and where clauses, so perfect to start with: https://mystery.knightlab.com/
Easy to Hard - DataLemur (by Nick Singh)
Photo by Growtika on Unsplash*
Last updated on August 9, 2025 at 7:00 AM UTC+7.