Read the case study and find the entities and attribute and make ERD Diagram?   Car Dealership Create an ERD for a car dealership. The dealership sells both new and used cars, and it operates a service facility, 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.

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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 Read the case study and find the entities and attribute and make ERD Diagram?  

Car Dealership

Create an ERD for a car dealership. The dealership sells both new and used cars, and it operates a service facility, 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.
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