[Koha-devel] SQL for 856 tag in marc record

[Frederic Demians]

> Anyone have a suggestion on how to get at least a count of these 856's 
> in the
> MARC record in my database?

SELECT COUNT(url) FROM biblioitems;

will give you the number of biblio records having at least one 856. A 
biblio record with several 856 tags will be count as 1 url.

If you want something more efficient, you could try to add an index 
named 'url' to your zebra configuration pointing to 856$t (and even 
other MARC subfields containing URLs). Then re-index. This PQF search 
will return exactly all records having something in 'url' field:

  @attr 1=url @attr 2=103 ""

But same problem than with MySQL alternative. Maybe a zebra scan command 
could help. Don't know how exactly.

--
Frédéric