Easier solution (since we need custom columns anyway) was to create SQL report like this: SELECT count(s.datetime) AS circs, b.title, b.author, i.ccode FROM statistics s JOIN items i USING (itemnumber) LEFT JOIN biblio b USING (biblionumber) WHERE i.itype=<<Item type|itemtypes>> AND i.homebranch=<<Home branch|branches>> AND i.ccode=<<Collection|CCODE>> GROUP BY b.biblionumber ORDER BY circs DESC