May 2001
Intermediate to advanced
336 pages
14h 36m
English
Content preview from Data Analysis for Database Design, 3rd Edition
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As explained previously, the first step in extending an E-R type diagram into an E-R
model is to decide how the relationship will be represented in terms of identifiers. Other
attributes can be omitted from the model at this stage. A table type that contains only
its (entity or relationship) identifier, together with any posted identifiers, will be called
a skeleton table. The combination of an E-R type diagram and its associated set of
skeleton table types will be called a skeleton E-R model. A table type may be either an
entity table type or a relationship table type. A row in a table will represent either an
entity occurrence or ...
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