text: create table products (
      id int auto_increment,
      name varchar(255) not null unique,
      stock_count int not null,
      description varchar(255) not null,
      constraint products_pk primary key (id)
  );
  
  create table reviews (
      id int auto_increment,
      title varchar(255) not null,
      stars int not null check(stars >= 1 and stars <= 5),
      product_id int not null,
      constraint reviews_pk primary key (id),
      constraint reviews_products_fk foreign key (product_id) references products(id)
  );
  
  create table comments (
      id int auto_increment,
      content varchar(500) not null,
      review_id int,
      constraint comments_pk primary key (id),
      constraint comments_reviews_fk foreign key (review_id) references reviews(id)
  );
  
  