Computer Sciences > GATE 2026 SET-1 > Relational Algebra
Consider a relational database schema with two relations R(P, Q) and S(X, Y).
Let E = {⟨u⟩ | ∃v ∃w ⟨u, v⟩ ∈ R ∧ ⟨v, w⟩ ∈ S} be a tuple relational calculus expression.
Which one of the following relational algebraic expressions is equivalent to E?
Let E = {⟨u⟩ | ∃v ∃w ⟨u, v⟩ ∈ R ∧ ⟨v, w⟩ ∈ S} be a tuple relational calculus expression.
Which one of the following relational algebraic expressions is equivalent to E?
Correct : b
Similar Questions
Consider a database that has the relation schemas EMP (EmpId, EmpName, DepId), and DEPT(DeptName, DeptId). Note that the DepId can be permitted to be NULL in th...
Consider the following two relations, R(A,B) and S(A,C);
The total number of tuples obtained by evaluating the following expression σB<C(R ⨝R.A=S.AS) is...
The relation schema, Person(pid, city), describes the city of residence for every person uniquely identified by pid. The following relational algebra operators...
Total Unique Visitors
Loading......