The relational algebra expression equivalent to the following tuple calculus…
GATE · 1999 · CS · Question 1 subparts
The relational algebra expression equivalent to the following tuple calculus expression is:
{ t | t ∈ r ∧ (t[A] = 10 ∧ t[B] = 20) }
- A.
σ(A=10 ∨ B=20)(r)
- B.
σ(A=10)(r) ∪ σ(B=20)(r)
- C.
σ(A=10)(r) ∩ σ(B=20)(r)
- D.
σ(A=10)(r) - σ(B=20)(r)
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