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Entity-Relationship diagrams for Case Study 3

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This is the third of three case studies that are used to guide the reader through the six steps outlined in Six-Step Relational Database Design™. Some of the outputs of the six step database design process are depicted here. Get a copy of Six-Step Relational Database Design™ to get the details of all six steps.

Scenario

Below is the scenario for Case Study 3 as described in Six-Step Relational Database Design™:

The registrar at a small college wants an application that will help their department keep track of the schedule of classes, the courses and lecturers appearing in the schedule, and the students registering for courses according to the schedule.

Courses are scheduled every semester and this is documented in the schedule of classes, which also documents the lecturers assigned to each schedule of a class. Students register for courses according to the schedule of classes.

Users (students, lecturers, and other college staff) must login to the application to gain access, and the application must keep track of user logins/logouts. In addition, users must have different levels of access, which will determine their access to different parts of the application.

 

Entity-Relationship diagrams

Below is the Simplified Entity-Relationship diagram that is output from Step 3 of the six step database design process as described in Six-Step Relational Database Design™:

Case Study 3 simplified E-R diagram

 

Below is the Detailed Entity-Relationship diagram that is output from Step 5 of the six step database design process as described in Six-Step Relational Database Design™:

Case Study 3 detailed E-R diagram

 

View the resulting Crow's Foot Relational-Model diagrams for Case Study 3.