CHAPTER 2 Why do we need a data model?
Ambiguous talkData models are preciseZero, one, many
Data modeling is an essential part of building an application. Communication and precision are the two key benefits that make a data model so important. This chapter explains these two core benefits, followed by a description of the areas within the business and application where the data model can be used. You will learn where communication occurs and about the three situations that can weaken data model precision.
People with different backgrounds and levels of experience across departments and functional areas need to speak with each other about business concerns and to make business decisions. In a conversation, therefore, there is a ...