Lesson 4.13. Requiring Data Entry
Figure 4-17. The Required field property
In most tables, there are usually at least a few fields that absolutely must contain data in order for the record to be meaningful. For example, at the absolute minimum, a customer record needs to have the customer's first and last nameotherwise, why bother entering it? You can specify that a field must contain data to prevent users from leaving out important information when they are entering data.
This lesson explains how you can make sure that a field has a value for each record.