text: CREATE TABLE `user` (
  `id` int unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL,
  `gender` varchar(20) NOT NULL,
  `age` SMALLINT NOT NULL DEFAULT '0',
  `is_member` tinyint(1) unsigned NOT NULL DEFAULT '1',
  `create_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `update_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
  );
  
  CREATE TABLE `course` (
  `id` int unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL,
  `create_at` timestamp DEFAULT CURRENT_TIMESTAMP,
  `update_at` timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
  );
  