text: CREATE TABLE dragon(
  	id              SERIAL PRIMARY KEY,
  	birthdate       TIMESTAMP NOT NULL,
  	nickname        VARCHAR(64),
  	is_public       BOOLEAN NOT NULL,
  	sale_value      INTEGER NOT NULL,
  	sire_value      INTEGER NOT NULL,
  	generation_id   INTEGER REFERENCES generation(id),
  account_id   INTEGER REFERENCES account(id),
  created_at      timestamptz NOT NULL DEFAULT now(),
  updated_at timestamptz NOT NULL DEFAULT now()
  );