Draw the Entity Relationship Diagram (ERD) as explained below. Be sure to show cardinality in both directions using Crows Foot notation. Do NOT include the fields/attributes or keys for each entity The business rules to create the Crow’s Foot ERD are: A department employs many employees, but each employee is employed by only one department.Some employees, known as “rovers,” are not assigned to any department.A division operates many departments, but each department is operated by only one division.An employee may be assigned many projects, and a project may have many employees assigned to it.A project must have at least one employee assigned to it.One of the employees manages each department, and each department is managed by only one employee.One of the employees runs each division, and each division is run by only one employee.

Answered: Draw the Entity Relationship Diagram…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Draw the Entity Relationship Diagram (ERD) as explained below. Be sure to show cardinality in both directions using Crows Foot notation. Do NOT include the fields/attributes or keys for each entity

The business rules to create the Crow’s Foot ERD are:

A department employs many employees, but each employee is employed by only one department.
Some employees, known as “rovers,” are not assigned to any department.
A division operates many departments, but each department is operated by only one division.
An employee may be assigned many projects, and a project may have many employees assigned to it.
A project must have at least one employee assigned to it.
One of the employees manages each department, and each department is managed by only one employee.
One of the employees runs each division, and each division is run by only one employee.

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