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GATE | CSE 2024 | Set 2 | Question 46
The relation schema, Person (pid, city), describes the city of residence for every person uniquely identified by pid. The following relational algebra operators are available: selection, projection, cross-product, and rename.
To find the list of cities where at least 3 persons reside, using the above operators, the minimum number of cross-product operations that must be used is
(A)
1
(B)
2
(C)
3
(D)
4
Answer
Please comment below if you find anything wrong in the above post
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