[AccessD] SQL Challenge!!!

Hi all
Is it possible to do an SQL which filters out individual default fields and shows null in those default fields?
I have this SQL:
SELECT  CONTACTS.Company, CONTACTS.Surname, CONTACTS.[First Name], CONTACTS.Counter
FROM CONTACTS
ORDER BY CONTACTS.Company, CONTACTS.Surname, CONTACTS.[First Name];
Default values for the 3 fields are (No prizes!) Company, Surname and First Name.
The unique identifier is effectively those 3 fields, but 1 or 2 may be default values.  (Counter is not included here!)
TIA
Kind regards,
David
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