Discussion
Some of the columns of a relation are at different sites is which of the following?
Answer: C
Correct answer: Vertical Partitioning
Vertical partitioning divides a relation by column, keeping the primary key with each fragment so the original can be reconstructed by a join. It suits a case where different sites use different attributes of the same entity - personnel data at one site and payroll data at another, for the same employees.
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