DROP TABLE IF EXISTS `cal_backgrounds`;
DROP TABLE IF EXISTS `cal_calendar_backgrounds`;
DROP TABLE IF EXISTS `cal_calendars`;
DROP TABLE IF EXISTS `cal_events`;
DROP TABLE IF EXISTS `cal_events_calendars`;
DROP TABLE IF EXISTS `cal_holidays`;
DROP TABLE IF EXISTS `cal_participants`;
DROP TABLE IF EXISTS `cal_reminders`;
DROP TABLE IF EXISTS `cal_views`;
DROP TABLE IF EXISTS `cal_settings`;
DROP TABLE IF EXISTS `cal_exceptions`;
DROP TABLE IF EXISTS `cal_groups`;
DROP TABLE IF EXISTS `cal_statuses`;
