GATE 2011
Related Database Management PYQs
Consider the relations R(A, B) and S(B, C). Which of the following SQL queries is equivalent to the relational algebra expression …
In the Thomas Write Rule concurrency control protocol, what happens when a transaction Ti attempts to write to data item X, and ti…
The division operator (÷) in relational algebra is most naturally used to express queries involving:
Let P, Q, R and S be the attributes of a relation in a relational schema. Let X → Y indicate functional dependency in the context …
In the context of relational database normalization, which of the following statements is/are true?
Consider a relational database schema with two relations R(P,Q) and S(X,Y). Let E = {<u> | there ∃ v, there ∃ w, <u,v> in R and <v…
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