Which of the following is NOT a valid Relational Algebra operator?
2022
Which of the following is NOT a valid Relational Algebra operator?
- A.
Join
- B.
Minus or Set Difference
- C.
Multiplication
- D.
Intersection
Attempted by 326 students.
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Correct answer: C
Relational Algebra defines specific operators for manipulating relations, such as Selection, Projection, Union, Intersection, Set Difference, and Join. While Cartesian Product combines all tuples from two relations, standard arithmetic multiplication is not a defined operator in this context. Therefore, Multiplication is the invalid option among standard relational algebra operations.