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Directions for the Problems. Draw a conceptual data model to model the scenario in each problem. Use the model constructs ( e . g .
Directions for the Problems. Draw a conceptual
data model to model the scenario in each problem. Use the model constructs eg the
material on the ER model and the enhanced ER model from chapters and as
appropriate and follow the modeling conventions used in the example problems in the
online lessons. Do not use the modeling conventions shown in Figure of the Hoffer
textbook which illustrate a data model in Visio notation. Be sure to include all
appropriate completeness constraints, disjointness constraints, and subtype indicators in
your conceptual data models
Circus on Wheels offers circus performances for residential, business, and school
clients. Attributes of Performance include PerformanceID, PerformanceType,
Duration, and Cost. Attributes of residential clients include ClientNumber,
ClientName composed of FirstName, MiddleInitial, and LastName
ClientAddress composed of Street, City, State, and ZipCode and
NearestCrossStreets. For each residential client, the two nearest cross streets are
stored. Attributes of business clients include ClientNumber, BusinessName,
ClientAddress composed of Street, City, State, and ZipCode and Industry.
Attributes of school clients include ClientNumber, SchoolName,
SchoolDistrictCode, and ClientAddress composed of Street, City, State, and
ZipCode Residential clients cannot also be business or school clients. Business
clients cannot also be residential or school clients. School clients cannot also be
residential or business clients. Circus on Wheels has no other types of clients.
All clients have had at least one performance, and many clients have had more
than one performance over time. A performance identified by PerformanceID
can be seen by more than one client over time, and some performances may not
yet have been seen by any clients eg a new performance that has just been
developed
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