1.

What does the following relational operation perform?ρx(A1,A2,A3…) (E)

A. It returns the result of expression E with the previous attribute names
B. It returns the result of expression E renaming the attributes as A1, A2, …
C. It returns the result of the relation E but saves the old attributes
D. None of the mentioned
Answer» C. It returns the result of the relation E but saves the old attributes


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