postgres_workshop

CREATE TABLE account(
   user_id serial PRIMARY KEY,
   username VARCHAR (50) UNIQUE NOT NULL,
   password VARCHAR (50) NOT NULL,
   email VARCHAR (355) UNIQUE NOT NULL,
   created_on TIMESTAMP NOT NULL,
   last_login TIMESTAMP
);

CREATE TABLE role(
   role_id serial PRIMARY KEY,
   role_name VARCHAR (255) UNIQUE NOT NULL
);

CREATE TABLE account_role
(
  user_id integer NOT NULL,
  role_id integer NOT NULL,
  grant_date timestamp without time zone,
  PRIMARY KEY (user_id, role_id),
  CONSTRAINT account_role_role_id_fkey FOREIGN KEY (role_id)
      REFERENCES role (role_id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION,
  CONSTRAINT account_role_user_id_fkey FOREIGN KEY (user_id)
      REFERENCES account (user_id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION
);