One of the posts on "Cure for Madness" brought up consistent null = handling which Oracle does not do. For instance, "Select Column1 + Column2 from TableA;" returns null if either or both = columns are null. However "Select sum(Column1) from table A" will = return a value if there are non-null values in the column. Is this true = for all SQL versions? =20 Ian MacGregor Stanford Linear Accelerato Center ian@xxxxxxxxxxxxxxxxx --- To unsubscribe - mailto:oracle-l-request@xxxxxxxxxxxxx&subject=unsubscribe To read recent messages - //freelists.org/archives/oracle-l/09-2004