te an ERD for a car dealership. The dealership sells both new and used cars, and it operates a service facility (see Figure B.2). Base your design on the following business rules: A salesperson may sell many cars, but each car is sold by only one salesperson. A customer may buy many cars, but each car is bought by only one customer. A salesperson writes a single invoice for each car he or she sells. A customer gets an invoice for each car he or she buys. A customer may come in just to have his or her car serviced; that is, a customer need not buy a car to be classified as a customer. When a cu

Np Ms Office 365/Excel 2016 I Ntermed
1st Edition
ISBN:9781337508841
Author:Carey
Publisher:Carey
Chapter5: Working With Excel Tables, Pivottables, And Pivotcharts
Section5.3: Pivottable And Pivotchart
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Create an ERD for a car dealership. The dealership sells both new and used cars, and it operates a service facility (see Figure B.2). Base your design on the following business rules:

  • A salesperson may sell many cars, but each car is sold by only one salesperson.
  • A customer may buy many cars, but each car is bought by only one customer.
  • A salesperson writes a single invoice for each car he or she sells.
  • A customer gets an invoice for each car he or she buys.
  • A customer may come in just to have his or her car serviced; that is, a customer need not buy a car to be classified as a customer.
  • When a customer takes one or more cars in for repair or service, one service ticket is written for each car.
  • The car dealership maintains a service history for each of the cars serviced. The service  records are referenced by the car’s serial number.
  • A car brought in for service can be worked on by many mechanics, and each mechanic may work on many cars.
  • A car that is serviced may or may not need parts (e.g., adjusting a carburetor or cleaning a fuel injector nozzle does not require providing new parts).
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