Periodically, the batch sales order system is executed. Depending on the volume of transaction
and computer resource constraints, the process may take place only once or several
At this point, the sales order file is in no useful sequence. To process a sequential transaction
file, it must be placed in the same sequence as the master file that it is updating.
Since the first master file to be updated in the systems is accounts receivable, the sort run
physically arranges the sales order transaction file sequentially by Account Number, which
is one of its secondary keys.