Briefly identify four important business rules for supertype/subtype relationships
What will be an ideal response?
Total specialization, partial specialization, disjoint, and overlap are four business rules for supertype/subtype relationships. The total specialization rule specifies that each entity instance of the supertype must be a member of some subtype in the relationship. The partial specialization rule specifies that an entity instance of the supertype is allowed not to belong to any subtype. The disjoint rule specifies that if an entity instance of the supertype is a member of one subtype, it cannot simultaneously be a member of any other subtype. The overlap rule specifies that an entity instance can simultaneously be a member of two (or more) subtypes.
You might also like to view...
After determining its pricing objectives, what is the next logical step a firm should take in setting its pricing policy?
A) It should analyze its competitors' costs, prices, and offers. B) It should select its pricing method. C) It should select its final price. D) It should determine the demand for its product. E) It should estimate the cost of its product.
"To busy multitaskers who need help remembering things, Evernote is a digital content management application that makes it easy to capture and remember moments and ideas from your everyday life using your computer, phone, tablet, and the Web"
This is an example of a(n) ________. A) positioning statement B) statement of purpose C) order-routine specification D) vision statement E) product specification
Social networks can be thought of as content built around a community, while a wiki is
A) content built around connectors. B) connectors built around a community. C) a community built around content. D) a marketer built around a medium. E) a medium built around a marketer.
Include a cover message with your résumé only if the employer requests one
Indicate whether the statement is true or false