An instance of a relation that satisfies all real world constraints

an-instance-of-a-relation-that-satisfies-all-real-world-constraints

An instance of a relation that satisfies all real world constraints is known as?

A. Proper relation

B. Ideal relation

C. Perfect relation

D. Legal relation

I got this question in exam.

Asked question is from Decomposition Using Functional Dependencies topic in section Relational Database Design of RDBMS

Correct choice is D. Legal relation

Explanation: A relation that satisfies all the real world constraints is called as a legal relation. An instance of a legal relation is called as a legal instance.