Syntax Error: SELECT t1.tag, COUNT( o1.object_id ) AS quantity
FROM freetagged_objects o1
INNER JOIN freetags t1 ON ( t1.id = o1.tag_id )
INNER JOIN freetagged_objects o2 ON ( o1.object_id = o2.object_id )
INNER JOIN freetags t2 ON ( t2.id = o2.tag_id )
WHERE t2.tag = 'undelete' AND t1.tag != 'undelete'
GROUP BY o1.tag_id
ORDER BY quantity DESC
LIMIT 0, 20