V$LOCK

Columns
   ___________________________
 
   ADDR
   KADDR
   SID
   TYPE
   ID1
   ID2
   LMODE
   REQUEST
   BLOCK
   CTIME

Related Views:

V$BUFFER_POOL 
V$CACHE
V$CACHE_LOCK
V$CLASS_PING 
V$DLM_CONVERT_LOCAL 
V$DLM_CONVERT_REMOTE 
V$DLM_LATCH 
V$DLM_MISC 
V$ENQUEUE_LOCK 
V$EVENT_NAME 
V$FALSE_PING
V$LATCH 
V$LATCHHOLDER 
V$LATCHNAME 
V$LATCH_CHILDREN 
V$LATCH_MISSES 
V$LATCH_PARENT 
V$LIBRARYCACHE 
V$_LOCK
V$LOCKED_OBJECT 
V$LOCKS_WITH_COLLISIONS 
V$LOCK_ACTIVITY 
V$LOCK_ELEMENT 
V$PING
V$RESOURCE  
V$RESOURCE_LIMIT 
V$TRANSACTION_ENQUEUE