Selection condition: (age = 40 v GPA >3.5) ∧ years > 2 (as…
Selection condition: (age = 40 v GPA >3.5) ∧ years > 2 (assuming age, GPA, and years are in the same relation) Which index(es) below that is/are most effective in executing this query with the above-mentioned selection condition?
Read DetailsConsider a relation R with five attributes X, Y, Z, W, V. Yo…
Consider a relation R with five attributes X, Y, Z, W, V. You are given the following dependencies: {X -> Y, YZ-> W, X->Z} List all candidate keys for R. Please justify your answer. Is R in 3NF? Please justify. Is R in BCNF? Please justify.
Read DetailsGiven a relation Criminal(id, name, crime) containing 1,000,…
Given a relation Criminal(id, name, crime) containing 1,000,000 records, where each data page of the relation holds 100 records. Assume that Criminal.id is a candidate key for this relation, with values lying in the range 0 to 999,999, and that Criminal is stored and sorted in Criminal.id order. a. For each of the following relational algebra queries: (i)
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