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

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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

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

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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.

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