'0000-00-00' AND (sale_start_date IS NULL OR sale_start_date = '0000-00-00') AND release_status IN ('in_content');; UPDATE releases SET sale_start_date = release_date WHERE release_date IS NOT NULL AND release_date <> '0000-00-00' AND (sale_start_date IS NULL OR sale_start_date = '0000-00-00') AND release_status IN ('in_content');; ]]>