Sunshine,
Bryan's solution should still work even if you don't have a PK. Simply list all the fields in the GROUP BY clause:

SELECT * FROM < TableToCheck > GROUP BY dob, last_name, first_name HAVING COUNT(*) > 1 INTO CURSOR dupes

HTH
>If I had a primary field my life would be so much easier! To find duplicate records, I need to compare the dob,last_name, and first_name.
>
>This is why I was going to use 2 tables i.e. select * from table1,table2 where table1.dob = table2.dob and table1.lastname= table2.lastname and table1.firstname = table2.firstname.
>
>Sunshine
>
>P.S. Thanks for your response!