Key Fields
In each table of the database there is a field or a
group of fields whose data uniquely identifies the record in the table. This is
normally a unique identification number, e.g. the company number, branch
number, and terminal number in the program Operator
Maintenance. In the database language, this is called the primary
key of the table.
The value of the key of each record in the table is
unique . In each input mask of the application programs, the name of the key
fields is in bold type.
Note:
To retrieve and display a record on the screen, values
in the key fields have to be completely entered.
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