Consider a relation that is fragmented horizontally

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Consider a relation that is fragmented horizontally by location (plant-number):

 Employee (name, address, salary, plant-number)

Assume each fragment has two replicas: one stored at the Los Angeles site and one stored locally at the plant site. Describe a good processing strategy (in outline, not SQL) for the following queries entered at the Baltimore site and say why you think it is a good processing strategy.

  • Find all employees at the San Diego plant.
  • Find the average salary of all employees.
  • Find the highest-paid employee at each of the following sites: Omaha, Chicago, Seattle, Richmond.
  • Find the lowest-paid employee in the comp

 

 

Reference no: EM13843469

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