Expedition · Vault-9
Signal "Kotomarket"
12 chapters · 77 lessons · from your first SELECT to K.'s message
Lessons earn Power: +10 per lesson, +50 per module
Station log · entry one
The year is 2184. Only fragments remain of old Earth's internet — and one untouched shard: the database of the Kotomarket store, a 2024 snapshot. Someone preserved it on purpose and left a signature: «For whoever knows how to ask. Start with SELECT. — K.»
You're a cadet archivist on Vault-9. Your mentor is QUERY, an old archival AI with the manners of a cat. Each chapter is a clearance level: the sharper your queries, the deeper the archive lets you in. What's hidden in the final block — only the one who reaches the end will know.
QUERY: "The archive doesn't open to the curious. It opens to the precise."
How the course works
- Live SQLRun every concept right away in a sandbox on the Kotomarket database
- Check yourselfQuizzes and fix-the-query in every lesson — a lesson counts when you’ve earned it
- Master checksChapters close out on real trainer tasks
- Archivist’s licenseThe finale: a capstone report and a verifiable certificate
The course dialect is PostgreSQL; MySQL / SQL Server differences are flagged in the lessons, with a porting cheat-sheet in Chapter 6. The core is chapters 0–7 plus the capstone; chapters 8–10 are the advanced track.
gate clearedcurrent stationaccess locked — PRO