Data Dungeon
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Chamber 29 · Twin Currents

Drowned Absence

NOT EXISTS

EXISTS+155 XP
Locked

Clear the previous chamber to unlock this one. You can still preview the briefing.

Briefing

EXISTS is Lockward knowledge. Flip it: who never appears in the beacon log?

Objective

Return diver name where NOT EXISTS a beacon_log row for that diver, ordered by name.

Hint

NOT EXISTS flips the Lockward EXISTS test.

Chamber schema

divers3 cols

All divers who entered the currents

idnamerank
beacon_log3 cols

Resurface beacon pings

iddiver_idsurfaced_on
chamber_29.sql

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

Warden

I am the Warden. Ask for a hint, paste a failing query, or request a review — I won't hand you the full answer.