Basics of Entity Relationship Modeling Assignment

Basics of Entity Relationship Modeling - Assignment ExampleEntity-relationship plots mostly used during design floor to identify system elements and their relationships. We must identify teleph unmatchable line entities, attributes, and relationships. Entities are something about which data is recorded. It is represented in ER diagrams by rectangles and named using singular nouns. Attributes are property trait or characteristic of an entity. assoil level ER diagrams do not include attribute for easiness. Relationship describes how business entities interact. From the given business scenario, Department has a one to many an(prenominal) relationship with employees and royers. This is because department can employ many employees and all(prenominal) employee is puted to one department. However, relationship between department and royers is optional since some are not assign any specific department. On the other hand, employee has a one to one relationship with department because o ne department can be managed my one employee. Division has a one to many relationship with department because one division can operate many departments and one division can operate apiece department. Since division can be managed by one employee, their association is a one to one relationship. Employees has a one to many relationship with projects. This is because many projects can be assigned to one employee to work on it. Also, one project must be assign to one employee. Client has a one to many relationship with project since one client can sponsor many project. The following is an entity relationship diagram for the given business scenario.