That is rather vague.
Do you mean you want to show records where a certain field is blank?
If so, in the query enter criteria of Is Null under the relevant field.
If the field is a text field you may need to enter
Is Null or = ""
in order to handle either null values or zero-length strings (both of
which look like blanks, but are handled differently by queries).
'====================================================
John Spencer
Access MVP 2002-2005, 2007-2009
The Hilltop Institute
University of Maryland Baltimore County
'====================================================