Abfrage von Oracle finden, die die Sitzung blockiert

select l1.inst_id,l1.sid, ' IS BLOCKING ', l2.sid,l1.type,l2.type,l1.lmode,l2.lmode,l2.inst_id
from gv$lock l1, gv$lock l2
where l1.block =1 and l2.request > 0and l1.id1=l2.id1
and l1.id2=l2.id2;