text: DROP TABLE IF EXISTS item, comment CASCADE;
  
  CREATE TABLE IF NOT EXISTS item (
    id serial primary key,
    item_name varchar(2000) not null,
    description text,
    create_date timestamp not null default now()
  );
  
  CREATE TABLE IF NOT EXISTS comment (
    id SERIAL PRIMARY KEY,
    comment text,
    create_date TIMESTAMP NOT NULL DEFAULT now(),
    item_id integer REFERENCES item(id)
  );