Why Use This Schema?
v Associating a student with a class is the logical idea
behind registering for a class, so Students & Classes
corresponds to a real phenomenon -- a plus
v Having classes listed in the student record violates
the goal of a fixed length record, and makes it
cumbersome to create a class list -- minuses
v Having students listed in the class record violates the
fixed length record goal, and makes it cumbersome
to create a registration list for each student -- minus
v “Registering students”  -- what STAR does -- can be
done without touching either Students or Classes
tables -- a plus