Question 472 Given two relations R1(A, B) and R2(C, D), the result of following query Select distinct A, B from R1, R2 is guaranteed to be […]

Question 473 Consider a relation R (A, B, C, D, E, F, G, H), where each attribute is atomic, and following functional dependencies exist. CH → […]

Question 475 Suppose a database schedule S involves transactions T1, T2, ………….,Tn. Consider the precedence graph of S with vertices representing the transactions and edges representing […]