Analyze the given entity relationship diagram and answer the following questions. What is the degree of “has” relationship? Identify primary key(s) Identify the category of each attribute Name the cardinalities

Analyze the given entity relationship diagram and answer the following questions. What is the degree of “has” relationship? Identify primary key(s) Identify the category of each attribute Name the cardinalities

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Publisher:Patrick M. Carey

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Concept explainers

Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.

Question

Analyze the given entity relationship diagram and answer the following questions.

What is the degree of “has” relationship?
Identify primary key(s)
Identify the category of each attribute
Name the cardinalities

Name
P ld
Ownerld
Property
has
Owner
Address
Contact
Zipcode
City
State

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