drop table if exists user;
drop table if exists admin;

create table user(
    id varchar(100) primary key not null,
    name varchar(50) not null,
    passwd varchar(120),
    create_time datetime not null,
    update_time datetime
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin; -- 大小写敏感

create table admin(
    id integer primary key auto_increment,
    name varchar(50) not null,
    passwd varchar(120) not null
);