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Question
Computer Science
Posted 2 months ago

ERD Practice (2)
An automobile insurance company needs to keep track of
information about vehicle policyholders. The company has to store
information about customers, cars, and accidents. Customer
information is License_no, name, and address. Customers can own
one or more cars, where the car information is Plate_no, model,
and year. A car may be involved in many accidents or none. If the
car is involved in an accident, the information stored is
Report_number, location, and date. For each car that is involved in
the accident, the damage amount will be estimated.
Draw the ERD.
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Answer from Sia
Posted 2 months ago
Sure, let's break down the ERD (Entity-Relationship Diagram) for the given scenario:

 Entities and Attributes:
1. 
Customer

   - License_no
   - Name
   - Address

2. 
Car

   - Plate_no
   - Model
   - Year

3. 
Accident

   - Report_number
   - Location
   - Date

4. 
Damage

   - Damage_amount

 Relationships:
1. 
Customer-Owns-Car
: One-to-Many (One customer can own multiple cars)
2. 
Car-Involved_in-Accident
: Many-to-Many (One car can be involved in multiple accidents, and one accident can involve multiple cars)
3. 
Accident-Has-Damage
: One-to-Many (One accident can have multiple damage records for different cars)

 ERD Diagram:
plaintext


 Key Concept and Explanation:
Key Concept
Entity-Relationship Diagram (ERD)
Explanation
An ERD is a visual representation of different data entities and their relationships. It helps in designing a database by identifying the entities, their attributes, and the relationships between them.

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