CHAPTER 2ELEMENTS USED IN LOGICAL DATA MODELS
Imagine, for a moment, that you’ve been asked to build a house. One of the first questions you’d ask yourself is, “Do I have all the tools and materials I need?" To answer this question, you need a plan for building the house. The plan, a construction blueprint, will provide the information on the required tools and materials. So step 1 is to design a blueprint. If you’ve never done this before, you’ll probably need to do some research to make sure you understand the overall process of designing the blueprint.
Like a blueprint, the logical database model you build will be the source for all the development of the physical database. Additionally, the logical model provides the high-level view of the ...
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