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If the decomposition is unable to represent certain important facts about the relation, then such a decomposition is called as?

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If the decomposition is unable to represent certain important facts about the relation, then such a decomposition is called as?

(a) Lossless decomposition

(b) Lossy decomposition

(c) Insecure decomposition

(d) Secure decomposition

I got this question in final exam.

Origin of the question is Features of Good Relational Design in portion Relational Database Design of RDBMS

1 Answer

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Correct answer is (b) Lossy decomposition

Explanation: If the decomposition is unable to represent certain important facts about the relation, then such a decomposition is called as lossy decomposition. Lossy decompositions should be avoided as they result in the loss of data.

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