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Customers have ID, names, phones and addresses. Cars have a CAR_ID,  a model and make, as well as a year. A customer can rent many cars A car can be rented by many customers Some customers do n ot rent cars All cars are rented by at least one customer. Given the above, there is a many-to-many relationship between customer and car.  Draw the many-to-many ER model in Crow's Foot notation

Customers have ID, names, phones and addresses. Cars have a CAR_ID,  a model and make, as well as a year. A customer can rent many cars A car can be rented by many customers Some customers do n ot rent cars All cars are rented by at least one customer. Given the above, there is a many-to-many relationship between customer and car.  Draw the many-to-many ER model in Crow's Foot notation

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Customers have ID, names, phones and addresses.

Cars have a CAR_ID,  a model and make, as well as a year.

  • A customer can rent many cars
  • A car can be rented by many customers
  • Some customers do n ot rent cars
  • All cars are rented by at least one customer.

Given the above, there is a many-to-many relationship between customer and car.

 Draw the many-to-many ER model in Crow's Foot notation 

 

Expert Solution
Step 1: Diagram Details

In Crow's Foot notation, a many-to-many relationship is represented by introducing an associative entity that connects the two main entities. 

The associative entity could be called "Rental" to represent the many-to-many relationship between "Customer" and "Car".


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