For automation interface information about the Can Be Null property, see Column (automation interface).

This property specifies that the Column can have an entry that is null.

By default, the Can Be Null check box is selected.

This property is set on the Options tab of a Column's Property Pages. The Can Be Null check box is available only if the Column is not used to define a prime key, that is, the Prime check box is cleared.

The following section provides information about the items and diagrams for which Can Be Null is a property. For more information about an item or diagram, click it.