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