text: create user arraydiary@localhost;
  create schema arraydiary;
  grant all privileges on arraydiary.* to arraydiary@localhost;
  
  use arraydiary;
  
  create table diaries (
    id varchar(20) not null,
    author varchar(20) not null,
    length int not null,
    createdAt timestamp default CURRENT_TIMESTAMP not null,
    stars int default 0 not null
  );
  