NIELIT O Level Exam

A prime attribute of a relation scheme R is an attribute that appears

A prime attribute of a relation scheme R is an attribute that appears


A. in all candidate keys of R.

B. in some candidate key of R.

C. in a foreign keys of R.

D. only in the primary key of R.




Correct Answer is :

B. in some candidate key of R.



Explanation
A prime attribute or key attribute of a relation scheme R is an attribute that appears in any of the candidate key of R, remaining attributes are known as non-prime or non-key tribute.
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