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CBSE Class 12 Computer Science Question 64 of 78

Relational Databases — Question 6

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6
Question

Question 6

A ............... is a property of the entire relation, which ensures through its value that each tuple is unique in a relation.

  1. Rows
  2. Key
  3. Attribute
  4. Fields
Answer

Key

Reason — Within the given relation, a set of one or more attributes having values that are unique within the relation and thus are able to uniquely identify that tuple, is said to be key of the relation.