Question

Which of the following is a binary operator in Relational Algebra?

• A. Selection
• B. Projection
• C. Division
• D. Rename

Hint:

Use Division when querying "for all" relationships in databases.

Answer 1

The Correct Option is C

Relational Algebra operators:
- Unary: Selection (σ), Projection (π), Rename (ρ)
- Binary: Union, Intersection, Difference, Cartesian Product, Division
Division is used when we need tuples related to all values in another relation.