person ID пате address employee student salary tot_credits instructor secretary rank hours_per_week Figure 8.9 Specialization and generalization.

Q: A difference between the Activity Diagram (AD) in the Functional View and in the Behavioral View is…

A: Swimlane is the way where the activities which are performed are grouped on a sequence diagram.

Q: Interview a friend or family member to elicit common examples of supertype/subtype relationships he…

A: A supertype is a generic entity type that has a relationship with at least one subtypes.  A subtype…

Q: Draw an E-R diagram for a bank.  It should include at least customers, checking accounts and loans,…

A: ER diagram stands for Entity Relationship diagram and in ER diagram there are mainly three…

Q: For each entity, there needs to be an indication of whether it is one-to-one, one-to-many or…

A: The answer is

Q: Translate the E/R diagram that you draw in the previous question into a set of relations, clearly…

A: Given Figure :-

Q: iven the ER-diagrams shown below, describe (in an organized way) as much as you can about the real…

A: Answer : The entities list of above ER diagram are : 1) office  2) employee  3) Patients. 4)…

Q: Hello, why on the diagram there are no associations or cardinalities?

A: All the other information is given in the previous answer. The modified diagram is given in step 2.

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A: ER diagram 1)

Q: Would you look if i got ER diagram right ?  I am asked to design a conceptual data model using ER…

A: Would you look if i got ER diagram right ?

Q: Computer Science Create the ER diagram for the following requirements and map it to relational…

A: ER diagram stands for Entity Relationship diagram. It contains mainly three components that are:…

Q: USE CASE DELIVERY OF QUALIFICATIONS

A: The sequence diagram, which is also known as an event diagram, shows how messages move through the…

Q: Design a generalization-specialization hierarchy for a motor-vehicle sales company. The company…

A: Hey, since there are multiple questions posted, we will answer the first question according to our…

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A: A Unified Modelling Language diagram may be a diagram supported the modelling language with the aim…

Q: Using Draw IO, create an ER Diagram for the following problems. Show all the steps involved…

A: A visitor can order a drink, a chicken, or both in a restaurant. A visitor must be assigned to a…

Q: Draw an entity relationship (ER) diagram of subject enrollment through LMS.

A: Step 1:- ER diagram(Entity-Relationship diagram) it is used define the relationship between the…

Q: Examine the differences and similarities between Concentration vs breadth For each entity,…

A: Difference between concentration vs breadth: Concentration: Advanced math, physics, and graphics…

Q: Draw me a context-level Data Flow Diagram  To draw a context-level Data Flow Diagram (DFD) for the…

A: A context-level Data Flow Diagram (DFD) provides a high-level overview of how information flows…

Q: What is the precise definition of a weak entity type? What is the undisclosed information? Could you…

A: Answer is given below

Q: What is weak entity type? The formula? For instance. Alternative specialisation?What does the ER…

A: A weak entity kind in an Entity-Relationship (ER) replica is an entity that cannot be Exclusively…

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A: E-R diagram for a car insurance company:

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A: In the world of database design, entity-relationship (ER) modeling plays a crucial role. ER diagrams…

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A: • Every book has a title, ISBN, year, and cost. The store likewise saves the writer and distributer…

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A:

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A: Here's how we can model this library system with an entity-relationship diagram (ERD): Entities and…

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A: ERD diagram for Purchasing System:The ERD diagram for the simple purchasing system is as follows:

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A: In the context of entity-relationship modeling, a weak entity type is an entity type that depends on…

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A: ER Description:   1- What Is ER Diagram: ER, suggests the relationship between one entity to another…

Q: What's the distinction between a Class Diagram and an Entity Relationship Diagram?

A: Introduction: The fundamental distinction between a Class Diagram and an Entity Relationship Diagram…

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A: The ER diagram requires following things-  It has 6 main entities connected via 5 relationship .IS A…

Q: write the simple scenario for school system and draw the data flow diagram(DFD) and…

A: Actually, database is  a used to stores the data.

Q: Describe how the composite attribute of an E-R diagram is transformed into relations

A: Given: Describe how the composite attribute of an E-R diagram is transformed into relations…

Q: Describe how the regular entity type of an E-R diagram are transformed into relations

A: Given: Describe how the regular entity type of an E-R diagram are transformed into relations

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.