Query Run
use itwiki_p; select * from revision where rev_timestamp between... 5 years ago
use itwiki_p; select * from revision where rev_timestamp = '20051225185304' 5 years ago
use itwiki_p; select user_registration from user where user_id = '31878' 5 years ago
use itwiki_p; select user_registration from user where user_id = '31877' 5 years ago
use itwiki_p; select max(user_id) FROM user where user_registration IS NULL 5 years ago
use itwiki_p; select max(user_id) where use_registration IS NULL 5 years ago