The Codex Archives of SQL Side Quest - Immersive quests, tutorials, and stories
Learn SQL with story-driven tutorials, interactive practice, and gamified challenges. The Codex Archives at SQL Side Quest turn SQL learning into quests, puzzles, and immersive guides designed to make mastering SQL fun and memorable.
Which SQL concepts actually matter for a data job? Here's what analysts write every day, what you can skip, and a checklist for knowing you're ready.
You can follow every solution but can't write one yourself. A 5-step method for any SQL problem, the patterns worth memorizing, and a practice order that works.
MySQL, PostgreSQL, T-SQL: beginners worry about picking the wrong one. About 90% is identical. Here's what differs, and which to start with.
Eight months in and JOINs still feel shaky? Forget the Venn diagrams. Watch JOINs pair real rows, and learn four habits that make the results predictable.
Customers with no orders show 1 order. Here's why COUNT(*) does that after a LEFT JOIN, the fix, and four related traps in the same kind of query.
VS Code isn't a database, and that's why SQLTools can't find one. Three beginner setups (SQLite, PostgreSQL, Docker) and a checklist for connection errors.