Page 24 - AIS access_chang_ingraham

22 CHAPTER 2 DATA MODELS AND RELATIONAL DATABASES

Expenditure Cycle Revenue Cycle
(0, N) ,..------------------------------,

FIGURE 2-2 Comprehensive REA Data Model for Cherokee Art and Antique Store

from Chapter 1 that we do not need to track in\ormation about Jesse since he is the only
person conducting sales. Therefore, it is not necessary to have a table to store data about
Jesse. If there were more than one salesperson, this would be necessary. In general, how-
ever, we need to create a table for each entity in the REA diagram to store data important
to the company.
Each column of a table represents an attribute (or characteristic) ofits entity. For exam-
ple, the attributes for the Customer Table may include Customer ID, Customer Name,

Resource Event Agent

Jesse
1 1
1 1
...........1
Inventory Sale

Customer

Cash
(Bank Cash
Account) Receipt

FIGURE 2-3 Complete REA Diagram for Cherokee's Revenue Cycle