Database Reference
In-Depth Information
233
FIGURE 7-4
Ryan updates the database
Suppose that Elena begins her update at this point. As shown in Figure 7-5, the DBMS reads the data for
Brookings Direct from the database, including the new balance of $531.50. Elena then enters the payment of
$100.00, which decreases the customer balance to $431.50 in her work area in memory. Finally, the DBMS
updates the database with Elena's change. The balance for Brookings Direct in the database is now $431.50,
which is correct.
