DROP TABLE IF EXISTS pets CASCADE;
DROP TABLE IF EXISTS owners CASCADE;
DROP TABLE IF EXISTS pets_owners;

CREATE TABLE pets (
  id serial PRIMARY KEY,
  name varchar(255),
  age integer,
  kind text
);

CREATE TABLE owners (
  id serial PRIMARY KEY,
  name text,
  is_alergic boolean
);

CREATE TABLE pets_owners (
  id serial PRIMARY KEY,
  pet_id integer NOT NULL REFERENCES pets ON DELETE CASCADE,
  owner_id integer NOT NULL REFERENCES owners ON DELETE CASCADE,
  role text
);


INSERT INTO pets (name, age, kind)
VALUES ('Chucky', 102, 'Goat');

INSERT INTO owners (name, is_alergic)
VALUES ('Glen', true);

INSERT INTO pets_owners (pet_id, owner_id, role)
VALUES (1, 1, 'Father')