the following diagram is an example of a supertype/subtype hierarchy.
An entity supertype is an entity type in which only common attributes are implemented described for entity subtypes that use this supertype. Learn vocabulary terms and more with flashcards games and other study tools.
Creating a Generalization Hierarchy The supertype is also assigned an attribute called a discriminator whose values.
. 68 A subtype can become a supertype if the subtype has other subtypes beneath it. 36 An entity cluster can be formed by. 61 A subtype can become a supertype if the subtype has other subtypes beneath it.
For simplicity we do not show subtype discriminators in this and most. Start studying Data-warehouse TF Midterm questions. 69 The following diagram is an example of a supertypesubtype hierarchy.
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62 The following diagram is. 61 A subtype can become a supertype if the subtype. We present an example of a supertypesubtype hierarchy in this section in Figure 3-10.
35 The figure below is an example of an. B hierarchical data model. How attributes are assigned in a supertype subtype hierarchy.
An instance of a subtype participates in a relationship that is unique to that. 70 In a supertypesubtype. When a subtype entity inherits values of the supertype attribute.
When a supertype entity inherits values of another. Use of a supertypesubtype relationship is necessary when which of the following exists. In the type hierarchy in Figure 1 sales_rep_t is a subtype of employee_t which is the supertype of sales_rep_t in the same way that person_t is the supertype of employee_tThe following.
When a supertype entity inherits values of the subtype attribute.
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