blank

Purpose
The blank keyword is used to assign a null value to a field or variable, or to compare a null value to the value in a field or variable.

Syntax
blank

Usage
A blank value is a null value, not a zero. When statistics are calculated on a field, blank values are not included in the calculation. Zero field values are included when generating statistics.
Field or variable values can be compared to blank, and blank can be assigned as a value to any field or variable.

Example
for MEMBERS with TOTAL DUE = blank ;
delete records .
end

This script tells DataEase: Delete the MEMBERS records that have a blank value in the TOTAL DUE field. It might be used to delete inactive MEMBERS records.