The Data Layer
The Transact database has two types of tables: those that store product and pricing information (as shown in Figure 17-3) and those that store order and shipment information (as shown in Figure 17-4).
Figure 17-3. Product tables
Figure 17-4. Order tables
A standard order consists of one or more computers, each of which is entered separately in the OrderStations table. Each computer is composed of several parts (a CPU, a hard drive, a motherboard, and so on), each of which is represented by a separate record in the OrderItems table. A record ...
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