4 Requirements Analysis and Conceptual Data Modeling
This chapter shows how the ER and UML approaches can be applied to the database life cycle, particularly in steps I through II(b) (as defined in Section 1.2), which include the requirements analysis and conceptual data modeling stages of logical database design. The example introduced in Chapter 2 is used again to illustrate the ER modeling principles developed in this chapter.
4.1 Introduction
Logical database design is accomplished with a variety of approaches, including the top-down, bottom-up, and combined methodologies. The traditional approach, particularly for relational databases, has been a low-level, bottom-up activity, synthesizing individual data elements into normalized tables ...
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