Question

What is a foreign key? 2 points a) a foreign key is a primary key of a relation which is an attribute in another relation b) a foreign key is a superkey of a relation which is an attribute in more than one other relations c) a foreign key is an attribute of a relation that is a primary key of another relation d) a foreign key is the primary key of a relation that does not occur anywhere else in the schema

Answer 1

option b is THE ANSWER

Answer 2

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