IBPS RRB IT Officer Practice Questions - IBPS RRB IT Officer Scale II Specialist Officer Exam

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Which of the following relational algebra expressions represents the division operation (R ÷ S) where R has schema (A, B) and S has schema (B)?

π_A(R) - π_A((π_A(R) × S) - R) π_A(R) - π_A(R × S) π_A(R) ∩ π_B(S) π_A(R - S)

Correct Answer:

π_A(R) - π_A((π_A(R) × S) - R)

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