SQL Guild
Every Query Is a Quest
Work within a fantasy guild — manage adventurers, fulfil quests, and help build the guild's reputation with every new request. Real SQL syntax, real practice, told as a story.
Learn By Actually Querying
Every exercise runs against a real, seeded guild database — no setup, no separate practice environment, no local installs. Open the ledger and start pulling adventurers, quests, and creatures the moment you arrive, building the exact query instincts expected on the job.
Try it right now — no login required
Practice Mode That Adapts to You
Pick your own mix of difficulty and how many exercises you want, or let auto-mix build a set from your pass rate and history. When you finish, see exactly what you got right, what you missed, and which topics deserve another pass.
Preview — practice results
Needs review: GROUP BY, Subqueries
Analytics That Point You at Your Weak Spots
Every attempt feeds back into your profile: accuracy by topic, time-to-solve trends, and a running list of what to revisit next. No guessing where to focus — the data tells you.
Preview — topic mastery
- Selecting & Filtering95%
- Joins61%
- Subqueries48%
Built for Anyone Who Needs SQL to Just Click
Developers
Sharpen the query instincts interviews and code review actually test, without spinning up a project.
Data Analysts
Practice the SELECT/JOIN/GROUP BY patterns behind everyday reporting, against a database built to be queried.
Students
Learn SQL the way you'll use it at work — solving real problems, not memorizing syntax in isolation.
Instructors
A ready-made, self-paced practice bank you can point a class at, with progress and weak-spot data built in.
Frequently Asked Questions
Do I need any SQL experience to start?
No. Levels start from SELECT and WHERE and build up in order — DELETE doesn't show up until you've had plenty of practice with WHERE first.
Do I need to install anything?
No. Every query runs against a sandboxed, seeded database in your browser session — try it yourself in the demo above.
What's the difference between Levels and Practice?
Levels are the story: guild dialogue and exercises in a fixed order that unlock as you pass them. Practice is on-demand revision — pick a difficulty and quantity, or let it auto-build a set from what you haven't mastered yet.
How is my score calculated?
Accuracy, time taken, and mistakes are tracked per exercise; a level passes at its stated passing-criteria percentage, with a higher grade tier for especially strong runs.
Where can I read more about the guild's world and the full curriculum?
The About page has the full guild lore and the complete list of SQL topics covered, level by level.