[Koha] Report help needed

[Elaine Bradtke]

This report finds Authors not linked to authorities.  But it only lists
their names (some of them are quite prolific, and sometimes it's only one
biblio that needs checking).
How can I make the following give the biblio number as well as the name?

SELECT DISTINCT heading FROM (
 SELECT ExtractValue(metadata,
'//datafield[@tag="100"]/subfield[@code="a"]') AS heading
 FROM biblio_metadata
 WHERE
  length(ExtractValue(metadata,
'//datafield[@tag="100"]/subfield[@code="a"]')) != 0 AND
  length(ExtractValue(metadata,
'//datafield[@tag="100"]/subfield[@code="9"]')) = 0
UNION
 SELECT ExtractValue(metadata,
'//datafield[@tag="110"]/subfield[@code="a"]') AS heading
 FROM biblio_metadata
 WHERE
  length(ExtractValue(metadata,
'//datafield[@tag="110"]/subfield[@code="a"]')) != 0 AND
  length(ExtractValue(metadata,
'//datafield[@tag="110"]/subfield[@code="9"]')) = 0
UNION
 SELECT ExtractValue(metadata,
'//datafield[@tag="111"]/subfield[@code="a"]') AS heading
 FROM biblio_metadata
 WHERE
  length(ExtractValue(metadata,
'//datafield[@tag="111"]/subfield[@code="a"]')) != 0 AND
  length(ExtractValue(metadata,
'//datafield[@tag="111"]/subfield[@code="9"]')) = 0
UNION
 SELECT ExtractValue(metadata,
'//datafield[@tag="130"]/subfield[@code="a"]') AS heading
 FROM biblio_metadata
 WHERE
  length(ExtractValue(metadata,
'//datafield[@tag="130"]/subfield[@code="a"]')) != 0 AND
  length(ExtractValue(metadata,
'//datafield[@tag="130"]/subfield[@code="9"]')) = 0
) AS heads
ORDER BY heading

Thanks in advance!

Elaine Bradtke
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)
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Charity Registered in England and Wales No. 305999
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"Writing about music is like dancing about architecture"
--Elvis Costello (Musician magazine No. 60 (October 1983), p. 52)