ex1
ex2 bonus - car table and person_car relation table
ex3
bonus for ex3
ex4
relation tables are key for many-to-many connections
ex5
ex6
ex6 - added my own relation query
ex7
combined ex2-7 into one file
ex8
ex9
extra credit ex9
ex10
added zeds cold pet for robot ex10
ex11 with parrot
clean up and rename code.sql ex12
teed up ex13
ex13 not completed