Hi all,
I'm trying to write a routine to identify duplicate records. I have a select statement that uses certain criteria to compare each record with all the others in the table. This seems to work but foreach record that produces a match I also get a match when I get to the matched record a compare that. Is there some way to prevent this?

My results look something like

id1 id2
1   2
2   1

All I really want in this instance is one entry.
This is the select statement

SELECT Addresses.iid, Addresses_a.iid;
 FROM duplicates!addresses, duplicates!addresses Addresses_a;
 WHERE Addresses.iid <> Addresses_a.iid;
   AND Addresses.csurname == Addresses_a.csurname;
   AND Addresses.cforename == Addresses_a.cforename;
   AND (Addresses.caddress_1 == Addresses_a.caddress_1;
   OR (Addresses.cpostcode == Addresses_a.cpostcode));
 ORDER BY Addresses.csurname, Addresses.cforename

Many thanks in anticipation.