Let r and s be two relations over the relation schemes R and S respectively,…
GATE · 2001 · CS · Question 1 subparts
Let r and s be two relations over the relation schemes R and S respectively, and let A be an attribute in R. The relational algebra expression
σA = a (r ⋈ s) is always equal to
- A.
σA = a (r)
- B.
r
- C.
σA = a (r) ⋈ s
- D.
None of the above
Attempted by 547 students.
Sign up free to check your answer
Sign up freeLoading lesson…