The following data model is designed to hold information relating to Vehicle Details, in particular Vehicle Manufacturers, Models and associated Vehicle information. For this scenario we need to define the following facts:
These facts define the requirements which the Database must meet and should be agreed between the Database User and the Database Designer prior to physical creation.
The draft facts have been defined as:
The Entities required should include:
The Entities are related as follows:
The design allows a Vehicle to have multiple Vehicle Features (Air Conditioning, Alloy Wheels, CD Player, Electric Windows etc.) assigned to it. These Vehicle Features can also be associated with many of the Vehicles, therefore we have a Many-To-Many relationship defined. This is broken into the two separate One-To-Many relationships shown using the LINK table - tblLINKFeaturesToVehicles.
When asking questions of the database we may need to know:
The following data model allows these questions to be answered and allows the information contained above to be stored logically and in a structured manner.
To view the data model please go to: Relationships for Vehicle Details and Information
Please download the data model relating to Relationships for Vehicle Details and Information which is contained in the zipped up Microsoft Word document.