About validation rules
Contents
When users enter data in a DataWindow object, you want to be sure
the data is valid before using it to update the database. Validation
rules provide one way to do this.
You usually define validation rules in the Database painter. To
use a validation rule, you associate it with a column in the Database
painter or DataWindow painter.
Another technique
You can also perform data validation through code tables, which
are implemented through a column’s edit style.
For more information, see About edit
styles.
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