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Under which condition, the value R ⟨ S/S equal to R (here ⟨ stands natural join and/ denotes division).

[A] When R and S are having at least one attribute common
[B] The degree of S is less than the degree of R
[C] The degree of R is less than the degree of S
[D] When R and S are having no attribute in common
Answer & Explanation
Option: [A]

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