text: -- create table nov_users
  CREATE TABLE nov_users (
  	id bigserial NOT NULL,
  	lastname varchar NULL,
  	firstname varchar NULL,
  	email varchar NOT NULL,
  	password varchar NOT NULL,
  	CONSTRAINT nov_users_pk PRIMARY KEY (id),
  	CONSTRAINT nov_users_un UNIQUE (email)
  );
  
  -- insert data
  INSERT INTO nov_users (lastname,firstname,email,password) VALUES 
  ('DOE','John','john.doe@les-enovateurs.com','azerty')
  ,('DOE','Louise','louise.doe@les-enovateurs.com','uiopq')
  ,('DOE','Sébastien','sebastien.doe@les-enovateurs.com','qsdf')
  ,('DOE','Camille','camille.doe@les-enovateurs.com','ghjk')
  ,('DOE','Damien','damien.doe@les-enovateurs.com','lmwx')
  ,('DOE','Sandrine','sandrine.doe@les-enovateurs.com','cvbn')
  ,('DOE','Philippe','philippe.doe@les-enovateurs.com','mlkj');
  
  CREATE TABLE nov_courses (
  	id bigserial NOT NULL,
  	title varchar NOT NULL,
  	description varchar NULL,
  	nov_users_id  bigint NOT NULL REFERENCES nov_users (id),
  	CONSTRAINT courses_pk PRIMARY KEY (id)
  );
  
  INSERT INTO nov_courses (title, description, nov_users_id) VALUES
  ('Phalcon 3', 'Develop complex and powerful web applications in PHP.', 1),
  ('Docker', 'Develop high-performance architectures.', 2),
  ('AWS', 'Work on the cloud.', 3),
  ('Git', 'Learn to versioning code', 4),
  ('Photoshop', 'Learn how to touch up your photos.', 5),
  ('Illustrator', 'Create vector images.', 6);
  