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Question

Suppose R is a table with 4 attributes A,B, C and D, and S be a table with 3 attributes B, E, F. Now given a particular instance of R and S.

S is empty, having no tuples. What is the correct no of tuples in the Result of given Query _____

Comments

the table will contain set of those values of R which are related to every value of s {2,3,5}  so none is related to every value of s so it will generate 0 as output

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I've a doubt. what do you mean by instance of R and S? is it intersection or cross product? as both will be NULL

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answer : 3