text: CREATE TABLE `unsubscribe_extra` (
    `id` int(11) NOT NULL,
    `unsubscribe_id` int(11) NOT NULL,
    `name` varchar(100) NOT NULL,
    `value` text NOT NULL
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
  
  ALTER TABLE `unsubscribe_extra`
    ADD PRIMARY KEY (`id`),
    ADD KEY `unsubscribe_id` (`unsubscribe_id`) USING BTREE;
  
  ALTER TABLE `unsubscribe_extra`
    MODIFY `id` int(11) NOT NULL AUTO_INCREMENT;
  
  ALTER TABLE `unsubscribe_extra`
    ADD CONSTRAINT `unsubscribe_extra_ibfk_1` FOREIGN KEY (`unsubscribe_id`) REFERENCES `unsubscribe` (`id`) ON DELETE CASCADE ON UPDATE CASCADE;
  