CREATE TABLE products (
  id                SERIAL PRIMARY KEY,
  name              VARCHAR(250) NOT NULL,
  price             INTEGER      NOT NULL
);


CREATE TABLE users (
  id                SERIAL PRIMARY KEY,
  firstName         VARCHAR(250) NOT NULL,
  lastName          VARCHAR(250) NOT NULL,
  username          VARCHAR(250) NOT NULL,
  password          VARCHAR(250) NOT NULL
);

CREATE TABLE orders (
  id                SERIAL PRIMARY KEY,
  status            VARCHAR(15),
  user_id           INTEGER NOT NULL REFERENCES users(id)
);

CREATE TABLE order_products (
  id                SERIAL PRIMARY KEY,
  quantity          INTEGER NOT NULL,
  order_id          INTEGER NOT NULL REFERENCES orders(id),
  product_id        INTEGER NOT NULL REFERENCES products(id)
)