>>>Oh good grief I see what your saying. I went back to my job specification and it seems data definitions for each of my three tables was given to me wrong. Guess it was just too long of a day yesterday to see it with my own eyes :) Here's what I revised and have running now:
>>>
>>>SELE azactive.acct AS account, azactive.name FROM azactive ;
>>> WHERE NOT EXISTS( ;
>>> SELE * FROM addunit WHERE addunit.account==azactive.acct) ;
>>> INTO CURSOR temp1

Better:
SELECT azactive.acct AS account, azactive.name FROM azactive ;
WHERE azactive.acct NOT IN (SELECT addunit.account FROM addunit);
INTO CURSOR temp1

This one should be faster since the inner query doesn't depend on the outer one. So, hopefully, it is calculated just once.

>>>SELE azactive.acct AS account, azactive.name FROM azhandle, azactive ;
>>> WHERE NOT EXISTS( ;
>>> SELE * FROM azhandle WHERE azhandle.account==azactive.acct) ;
>>> INTO CURSOR temp2

Probably the same goes for this one if it's simetric to the first one (after you fix it:)).

I'm not very sure that these SELECTs will be faster. Please tell me if I was right. (I don't have now real big dbfs and on random generated tables is not the same.)

Vlad