a) primary key(a1, a2, a3)
b) primary key(a1)
c) foreign key(a1, a2) references S
d) foreign key(a1, a2)
If a1, a2, a3 are attributes in a relation and S is another relation, which of the following is an incorrect specificati
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answerhappygod
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If a1, a2, a3 are attributes in a relation and S is another relation, which of the following is an incorrect specificati
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