September 2004
Beginner to intermediate
388 pages
6h 34m
English
Content preview from PROC SQL: Beyond the Basics Using SAS®
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1.2. Database Design
Activities related to “good” database design require the identification of end-user requirements and involve defining the structure of data values on a physical level. Database design begins with a conceptual view of what is needed. The next step, called logical design, consists of developing a formal description of database entities and relationships to satisfy user requirements. Seldom does a database consist of a single table. Consequently, tables of interrelated information are created to enable more complex and powerful operations on data. In the final step, referred to as physical design, the goal is to achieve optimal performance and efficient storage of the logical database.
1.2.1. Conceptual View
The health and ...
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