Terminate a user process
Syntax
      KILL {session_ID | UOW} [WITH STATUSONLY] 
Key
   session_ID    The session ID of the process to terminate.Int)
   UOW           The Unit of Work ID of a  distributed transaction. (GUID)
   STATUSONLY    Generate a rollback progress report (for an earlier KILL statement)
The KILL statement may take some time to roll back a long transaction.
KILL WITH STATUSONLY will not terminate or roll back any transactions.
Example
KILL 54;
KILL 54 WITH STATUSONLY;
GO
"Whom the gods love dies young" ~ Menander 300 BC
Related commands:
  sys.dm_tran_locks
Equivalent Oracle command:  ALTER SYSTEM KILL SESSION