text: SELECT customers.cname, rentals.rid FROM
  	customers NATURAL LEFT JOIN rentals;
  
  SELECT customers.cname, rentals.rid, movies.mname FROM
  	customers NATURAL LEFT JOIN rentals
  	NATURAL LEFT JOIN movies;
  
  SELECT customers.cname, rentals.rid, movies.mname FROM
  	customers NATURAL LEFT JOIN rentals
  	NATURAL FULL JOIN movies;
  