I've got something that extracts the biblio numbers from the 999c. Is there any way to ask it to only show the ones that contain multiple 999c? SELECT biblionumber, ExtractValue(marcxml, '//datafield[@tag="999"]/subfield[@code="c"]') AS comp FROM biblioitems -- Elaine Bradtke Data Wrangler VWML English Folk Dance and Song Society | http://www.efdss.org Cecil Sharp House, 2 Regent's Park Road, London NW1 7AY Tel +44 (0) 20 7485 2206 (This number is for the English Folk Dance and Song Society in London, England. If you wish to phone me personally, send an e-mail first. I work off site) -------------------------------------------------------------------------- Registered Company No. 297142 Charity Registered in England and Wales No. 305999 --------------------------------------------------------------------------- "Writing about music is like dancing about architecture" --Elvis Costello (Musician magazine No. 60 (October 1983), p. 52)