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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
an internal constraint to the predicate, press the Add Internal button to invoke the Add
Constraint dialog and add the constraint there. To add an external constraint to the pred-
icate, press the Add External button to invoke the Add Constraint dialog, and add the con-
straint there.
5.5 Set-Comparison Constraints
If two roles are played by the same object type, or their object types share a common
supertype, they are said to be compatible, and it is meaningful to compare their popu-
lations. The same is true for role-sequences (ordered lists of roles). For databases, only
three set-comparison operators are relevant: subset (), equality (=) and mutual ...
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Publisher Resources

ISBN: 9781558609198