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CBSE Class 12 Computer Science Question 5 of 78

Relational Databases — Question 5

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Question

Question 5

Assertion. A data table can have only one primary key.

Reason. In a data table, there can be only one attribute/field containing unique values for each row.

Answer

(c)

Assertion is true but Reason is false.

Explanation
A data table can have only one primary key. There can be more than one attribute in a relation possessing the unique identification property. They are known as candidate keys.