If a1, a2, a3 are attributes in a relation and S is another relation, which of the following is an incorrect specificati
Posted: Thu Jul 14, 2022 8:53 am
a) primary key(a1, a2, a3)
b) primary key(a1)
c) foreign key(a1, a2) references S
d) foreign key(a1, a2)
b) primary key(a1)
c) foreign key(a1, a2) references S
d) foreign key(a1, a2)