Entity Relationship (ER) Diagram: The following figure illustrates the ER Diagram for Hudson Engineering Group in (HEG) Crow’s Foot notation: Explanation: In above ERD, A trainee can take several class and each class can have more trainees, so there is an “M: N” relationship between the entities TRAINEE and CLASS. Hence a composite entity “ENROLLMENT” is act as bridge between those entities. The relationship between the entities INSTRUCTOR and CLASS is 1: M. Because a class is taken by only one instructor but an instructor can take more classes. The relationship between the entities COURSE and CLASS is also1: M.

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"Mpho is very excited about the new information system to be built for his spaza shop. In this section, you need to make Mpho understand database concepts and how they will benefit his spaza shop." To make Mpho understand databases and database management system, use an infographic to list and explain the hierarchy of data. The infographic must be easy to read. The data hierarchy must be listed in the order of the smallest to the largest.

Answer 1

Question

Chapter 4, Problem 5P

a.

Program Plan Intro

Entity Relationship (ER) Diagram:

The following figure illustrates the ER Diagram for Hudson Engineering Group in (HEG) Crow’s Foot notation:

Explanation:

In above ERD, A trainee can take several class and each class can have more trainees, so there is an “M: N” relationship between the entities TRAINEE and CLASS. Hence a composite entity “ENROLLMENT” is act as bridge between those entities.

The relationship between the entities INSTRUCTOR and CLASS is 1: M. Because a class is taken by only one instructor but an instructor can take more classes.

The relationship between the entities COURSE and CLASS is also1: M.

b.

Explanation of Solution

Relationship:

The relationship between the entities INSTRUCTOR and CLASS is 1: M. Because a class is taken by only one instructor but an instructor can take several classes...

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