database - Is it good to have foregin key reference to all the tables (indirect references)? -

its simple scenario :

university table

univ_idn         name 1                ut  

university campus table

campus_idn  name 1           ut austin 2           ut arlington 

event registration table

event_idn  campus_idn  univ_idn 1          2           1 2          1           1 

event @ point of time concerned campus_idn , not univ_idn directly . although makes sense , required have univ_idn in event registration table or should have campus_idn in terms can univ_idn ? how db's designed ?

i think need univ_idn column in university campus table:

 campus_idn  name          univ_id 1           ut austin     1 2           ut arlington  1 

then event registration table doesn't need univ_id column: can find out university campus table.