Chamber 17 · Gate of Seals
Proof of Presence
Who still holds a torch
Clear the previous chamber to unlock this one. You can still preview the briefing.
Briefing
Only prisoners who still appear in the torch log may approach the seal. Prove presence with EXISTS — no half-measures.
Objective
Return prisoner name for those who have at least one row in torch_log (via EXISTS), ordered by name.
Hint
EXISTS (SELECT 1 FROM … WHERE …) is true when the subquery finds any row.
Chamber schema
prisoners3 colsAll known prisoners
torch_log3 colsRecent torch sightings by prisoner
Results appear here after you run a query. Correct rows alone are not enough — the Warden must seal your loot.
Ask the Warden
AI SQL coach — hints and fail reviews, not spoilers
I am the Warden. Ask for a hint, paste a failing query, or request a review — I won't hand you the full answer.