服务端与客户端连接数据库建表语句,有3张表 CREATE TABLE `book_man_sys_user` ( `id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT, `username` VARCHAR(50) NOT NULL, `password` VARCHAR(50) NOT NULL, `token` VARCHAR(50) NULL DEFAULT NULL, PRIMARY KEY (`id`), UNIQUE INDEX `username` (`username`) ) COLLATE='utf8_general_ci' ENGIN