Using
в delete
оператор не допускается в оракуле.
Попробуйте это:
delete from podium_core.pd_field_tag t1
Where (t1.nid, t1.tag, t1.field_nid) in
(Select t2.nid, t2.tag, t2.field_nid
From podium_core.pd_field_tag t2
WHERE t1.nid < t2.nid
AND t1.tag = t2.tag
AND t1.field_nid = t2.field_nid);
Cheers !!