`grade_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0,
`grade_expired` TIMESTAMP NOT NULL DEFAULT '0000-00-00 00:00:00',
PRIMARY KEY (`id`),
`grade_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0,
`grade_expired` TIMESTAMP NOT NULL DEFAULT '0000-00-00 00:00:00',
PRIMARY KEY (`id`),