ALTER TABLE `award_awards` ADD `presenter` VARCHAR( 128 ) NOT NULL AFTER `criteria` ; CREATE TABLE `winners` ( `id` INT UNSIGNED NOT NULL AUTO_INCREMENT , `awards_prizes_id` INT UNSIGNED NOT NULL , `projects_id` INT UNSIGNED NOT NULL , `year` INT UNSIGNED NOT NULL , PRIMARY KEY ( `id` ) ); ALTER TABLE winners ADD UNIQUE ( awards_prizes_id, projects_id, year );