[ic] Return multiple fields, unique records on non-primary field?

[Bob Pickle <suppressed>]

I want to do a search that returns the SKU and at least one additional
field. I want to throw out all records that are not unique on that
additional field, as long as they are not blank.

When I use un=1 in the search to try to accomplish this, it doesn't seem
to work with any field that is not the first field listed under rf=.

Is there an easy way to accomplish this?

Bob

begin:vcard 
n:Pickle;Bob
tel;fax:218-456-2563
tel;work:218-456-2568
x-mozilla-html:TRUE
url:www.pickle-publishing.com
org:Pickle Publishing
adr:;;1354 County Hwy 21;Halstad;MN;56548;USA
version:2.1
email;internet:suppressed
fn:Bob Pickle
end:vcard