Under what circumstances would the system have to resort to a linear search when implementing a Selection operation?
What will be an ideal response?
(1) Unordered file, with no indexes.
(2) Composite predicate where one of the terms contains an OR condition and the term
requires a linear search.
(3) Composite predicate where no attribute can be used for efficient retrieval.
Computer Science & Information Technology
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Computer Science & Information Technology