Object Schema for Relational Schema
Almost everything from the original relational schema, except for Course, has been included in the class hierarchy up to this point. Adding Course is straightforward since intersection entities for many-to-many relationships are not necessary in an object schema. The following figure illustrates the complete object schema derived for the example, as outlined in the original relational schema. Also see more on many-to-many relationships.
Next: Checking the class hierarchy. Also see the related content below.
More on the general topic: Multi-Type Views
- Teacher View
- Employee View
- Creating Class Hierarchy by Factoring Attributes
- Adding the Student Class to the Hierarchy
- Adding the Person Class to the Hierarchy
Related Fact Book
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The Savvy Manager's Guide
Douglas K Barry is also the author of a book that explains Web Services, service-oriented architecture, and Cloud Computing in an easy-to-understand, non-technical manner.
Web Services, Service-Oriented Architectures, and Cloud Computing: The Savvy Manager's Guide (Second Edition)
by Douglas K Barry with David Dick
This is a guide for the savvy manager who wants to capitalize on the wave of change that is occurring with Web Services, service-oriented architecture, and—more recently—Cloud Computing. The changes wrought by these technologies will require both a basic grasp of the technologies and an effective way to deal with how these changes will affect the people who build and use the systems in our organizations. This book covers both issues. Managers at all levels of all organizations must be aware of both the changes that we are now seeing and ways to deal with issues created by those changes.