We can convert any weak entity set to a strong entity set by simply adding appropriate attributes. Why, then, do we have weak entity sets? (a) We want to avoid the data duplication and consequent possible inconsis- tencies caused by duplicating the key of the strong entity set. (b) Weak entities reflect the logical structure of an entity being dependent on another entity. (c) Weak entities can be deleted automatically when their strong entity is deleted. (d) All of the above.

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A: Graphically identifying an entity in a Crow’s Foot notation: In ER model, the term entity refers to…

Q: Define a weak entity set and a strong entity set

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A: The Answer is given below step.

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A: Answer: I have given answered in the handwritten format in brief explanation

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A: A simple (atomic) attribute is__________?

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A: Correct regarding functional dependencies in given relation R

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A: Given:   Consider the following lattice structure of generalization and specialization (attributes…

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Q: can be converted to a strong entity set by simply adding the appropriate attributes. Why,

A: For the following reasons, a weak entity set is required:

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A: Required attribute is an attribute that must have a value in it. hence, it can not be left empty.

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A:

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.