Intrinsic Property .IsSqlNull

The ASQN attribute has an intrinsic read-only property .IsSqlNull. This may have the values True or False. If the field is SQL Null, .IsSqlNull is True, otherwise, it is False.

Note that Intrinsic properties can also be used in conditions that are defined by or passed to an I/O module, but this is not recommended. Refer to Specifying WHERE Parameters in I/O Commands.

Also See

ASQN (Allow SQL Nulls) attribute
Intrinsic Method .AsValue
Assignment, Conditions, and Expressions with Fields allowing SQL Null