CREATE TABLE `conferences` ( `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY , `name` VARCHAR( 128 ) NOT NULL , `type` ENUM( 'sciencefair', 'scienceolympics' ) NOT NULL , `status` ENUM( 'pending', 'running', 'ended' ) NOT NULL ) ENGINE = MYISAM ; ALTER TABLE `config` ADD `conferences_id` INT NULL DEFAULT NULL; ALTER TABLE `dates` ADD `conferences_id` INT NULL DEFAULT NULL;