Question

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(1) Reema is created a table in a database. She wants to identify every record in the table uniquely.Which
Concept should she used to achieve the same?
a) Primary key b)Candidate key C) Foreign key d) None of these
key is field or set of field that is use to establish a relation between the two table​

Answer 1

Answer:

a) Primary key

Explanation:

By using primary key, no entry can be duplicate or null. So she can uniquely identify the records