Computer Science · Database Management Systems
For two union-compatible relations R1(A, B) and R2(C, D), what is the result of the operation R1 ∧(A=C ∧ B=D) R2?
- 1R1 ∩ R2✓
- 2R1 - R2
- 3R1 × R2
- 4R1 ∪ R2
Correct answer
R1 ∩ R2
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