Computer Science, asked by bharat446, 8 months ago

i) What is a Primary key? why do we require it? (ii) What is a foreign key? [2+2=4 marks]

Answers

Answered by bhavishyamudgal31

0

Answer:

answer. specific choice

Answered by yadavutkarsh2005

2

a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation.

a foreign key is a set of attributes that references a candidate key.

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