Suppose that a B+-tree index on branch-city is available on relation branch, and that no other index
Question:
Suppose that a B+-tree index on branch-city is available on relation branch, and that no other index is available. What would be the best way to handle the following selections that involve negation?
a. σ ¬ (branch-city<“Brooklyn”)(branch)
b. σ ¬ (branch-city=“Brooklyn”)(branch)
c. σ ¬ (branch-city<“Brooklyn” ∨ assets<5000)(branch)
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Step by Step Answer:
a Use the index to locate the first tuple whose branchcity field ...View the full answer
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