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Database Modeling with Microsoft® Visio for Enterprise Architects
book

Database Modeling with Microsoft® Visio for Enterprise Architects

by Terry Halpin, Ken Evans, Pat Hallock, Bill Maclean
September 2003
Intermediate to advanced content levelIntermediate to advanced
425 pages
16h 30m
English
Morgan Kaufmann
Content preview from Database Modeling with Microsoft® Visio for Enterprise Architects
object types should be replaced by nested object types. If the original database involved
views, you need to make any needed adjustments to prevent the reverse-engineered
constructs leading to base tables when the schema is forward engineered.
Once the semantics of the as-is database schema have been clarified, you should
look to see if some additional constraints need to be added to provide a more complete
to-be model. As a trivial example, the value constraint {1..5} has been added to
CertificationLevel in Figure 8–13.
Often, you may find that the database was badly designed in the first place, with
problems such as uncontrolled denormalization and ...
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Publisher Resources

ISBN: 9781558609198