text: CREATE TABLE reviews (
    id INT AUTO_INCREMENT NOT NULL PRIMARY KEY,
    book_id INT NOT NULL,
    user_id INT NOT NULL,
    review_content VARCHAR(255),
    rating INT,
    published_date DATE,
    CONSTRAINT reviews_book_id_fkey FOREIGN KEY (book_id) REFERENCES books(id) ON DELETE CASCADE ON UPDATE NO ACTION,
    CONSTRAINT reviews_user_id_fkey FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE ON UPDATE NO ACTION,
    CONSTRAINT published_date_rating_key UNIQUE (published_date, rating)
  );
  