text: -- 用户表 --
  CREATE TABLE `user` (
    `id` bigint(10) NOT NULL AUTO_INCREMENT,
    `user` varchar(50) NOT NULL DEFAULT '' COMMENT '用户',
    `name` varchar(255) COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '用户名称',
    `password` varchar(255) COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '用户密码',
    `mobile` varchar(255) COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '手机号',
    `gender` char(5) COLLATE utf8mb4_general_ci NOT NULL COMMENT '男｜女｜未公开',
    `nickname` varchar(255) COLLATE utf8mb4_general_ci DEFAULT '' COMMENT '用户昵称',
    `create_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
    `update_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (`id`),
    UNIQUE KEY `name_index` (`name`),
    UNIQUE KEY `name_index2` (`name`),
    UNIQUE KEY `user_index` (`user`),
    UNIQUE KEY `mobile_index` (`mobile`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
  
  CREATE TABLE `student` (
    `id` bigint NOT NULL AUTO_INCREMENT,
    `class` varchar(255) COLLATE utf8mb4_bin NOT NULL DEFAULT '',
    `name` varchar(255) COLLATE utf8mb4_bin NOT NULL DEFAULT '',
    `age` tinyint DEFAULT NULL,
    `score` float(10,0) DEFAULT NULL,
    `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
    `update_time` timestamp NULL DEFAULT NULL,
    PRIMARY KEY (`id`) USING BTREE,
    UNIQUE KEY `class_name_index` (`class`,`name`)
  ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;