GATE CS 2012 — Question 43

Multiple choice 2 marks Question 43 2012

Question 43

MCQ 2 marks · −0.66 Databases

Suppose \(R_1(A, B)\) and \(R_2(C, D)\) are two relation schemas. Let \(r_1\) and \(r_2\) be the corresponding relation instances. \(B\) is a foreign key that refers to \(C\) in \(R_2\). If data in \(r_1\) and \(r_2\) satisfy referential integrity constraints, which of the following is ALWAYS TRUE?

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GATE CS — Computer Science & IT 2012 Databases

Source: GATE 2012 Computer Science and Information Technology (question number approximate)

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