"Smart people can walk and chew gum" (at the same time, that is) is a wellworn saying. A corollary is that "theDUMBONES can ONLY walkORchew gum,but NOTBOTH ATONCE". The diagram above illustrates these sayings, as does a set of JOINdiagrams in this exam.

Select the code that corresponds to theDUMBONES:

	a.	none of these choices ;
	b.	SELECT [list] FROM Table_Left L INNER JOIN Table_Right R ON L.Key = R.Key ;
	c.	SELECT [list] FROM Table_Left L FULL OUTER JOIN Table_Right R ON L.Value = R.Value ;
	d.	SELECT [PropertyList] FROM Properties_Left L FULL OUTER JOIN Properties_Right R ON L.Value = R.Value WHERE L.Value IS NULL OR R.Value IS NULL ;

Property A is the left set. Property B is the right set. The intersection is where an element has both properties. Property A: One can walk Property B: One can chew gum Intersection: one can walk and chew gum