To explain inheritance and its benefits.

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A Dia file has been created for you to extend and can be found on Company.dia represents a completed ER schema which, models some of the information implemented in the system, as a starting point for this exercise. Understanding the ER schema for the Company database. To demonstrate that you understand the information represented by the schema, explain using EMPLOYEE, DEPARTMENT, PROJECT and DEPENDENT as examples: attributes, entities and relationships cardinality & participation constraints on relationships You should explain questions a and b using the schema you have been given to more easily explain your answers. Creating and Extending Entity Relationship (EER) Diagrams. To demonstrate you can create entity relationship diagrams extend the ER as described in Company.dia by modelling new requirements as follows: Create subclasses to extend Employee. The employee type may be distinguished further based on the job type (SECRETARY, ENGINEER, MANAGER, and TECHNICIAN) and based…

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Chapter 9, Problem 39RQ

To determine

To explain inheritance and its benefits.

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A Dia file has been created for you to extend and can be found on Company.dia represents a completed ER schema which, models some of the information implemented in the system, as a starting point for this exercise. Understanding the ER schema for the Company database. To demonstrate that you understand the information represented by the schema, explain using EMPLOYEE, DEPARTMENT, PROJECT and DEPENDENT as examples: attributes, entities and relationships cardinality & participation constraints on relationships You should explain questions a and b using the schema you have been given to more easily explain your answers. Creating and Extending Entity Relationship (EER) Diagrams. To demonstrate you can create entity relationship diagrams extend the ER as described in Company.dia by modelling new requirements as follows: Create subclasses to extend Employee. The employee type may be distinguished further based on the job type (SECRETARY, ENGINEER, MANAGER, and TECHNICIAN) and based…

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