text: create table if not exists USER (
  	
  	id int auto_increment primary key,
  	name varchar(128) not null
  );
  
  create table if not exists HOBBY (
  	
  	name varchar(128) primary key
  );
  
  create table if not exists USER_HOBBY (
  	
  	userId int not null,
  	hobbyName varchar(128) not null,
  	
  	foreign key(userId) references USER(id),
  	foreign key(hobbyName) references HOBBY(name),
  	
  	primary key(userId, hobbyName)
  );