Chapter 2 - Data Models
Demonstration of building basic ERD
DealCo Relational Diagram
 I will complete problem 4 and 5 from your book (page 59)in this demo.
Our Midwest region contains several stores, 2 in Missouri, one in Kansas (etc..). Each of our stores
employs between 50 to 75 employees each. Yes, we have several job titles and each employee has a job
to do. In our Kansas City store, Jim is the manager, Mark, Sue and Bob are assistant managers, Kim
and Jeff are a couple of our cashiers. And so on, and so on………
Demo for building DealCo ERD
Write all the
Identify each
Business Rules
Relationship Type
1:M
1:M
1:M
One Store has many Employees
Each Employee is employed by one Store
One Job title is assigned to many Employees
Each Employee has one Job title
One Region contains many Stores
Each Store belongs in one Region
contains
is assigned to
references
The End
Until Next Time