text: drop database `MyShelf`;
  create database `apka`;
  use `apka`;
  show tables;
  
  create table `users` (
  `id` int not null auto_increment,
  `firstname` varchar(128) not null,
  `lastname` varchar(128) not null,
  `username` varchar(128) not null,
  primary key(`id`));
  
  select * from users;
  
  insert into users values (
  '1',
  'Jan',
  'Kowalski',
  'jan01');