How would I find the differences between three tables.. For example T1 is
a table of names, with the lastname as the primary key. T2 is a table of
ages, birthdays, addresses..etc, with Ages and Lastnames as the primary keys.
T3 is a table of presents per age, with Age as the primary key.
so (T1.lastname=T2.Lastname AND T2.Age = T3.Age) How do I find out if one
entry has been added or deleted from any of these tables?