DROP TABLE IF EXISTS users;
DROP TABLE IF EXISTS sessions;
DROP TABLE IF EXISTS ranks;
DROP TABLE IF EXISTS awards;
DROP TABLE IF EXISTS trainings;
DROP TABLE IF EXISTS missions;
DROP TABLE IF EXISTS qualifications;
DROP TABLE IF EXISTS record_ranks;
DROP TABLE IF EXISTS record_awards;
DROP TABLE IF EXISTS record_training;
DROP TABLE IF EXISTS record_qualifications;
DROP TABLE IF EXISTS records_missions;
DROP TABLE IF EXISTS attendance;
DROP TABLE IF EXISTS roster_groups;