DBCC INPUTBUFFER / OUTPUTBUFFER

Display the last statement sent from a client to a database instance.

Syntax
      DBCC INPUTBUFFER (session_id [, request_id ])
         [WITH NO_INFOMSGS ]

      DBCC OUTPUTBUFFER (session_id [, request_id ])
         [WITH NO_INFOMSGS ]

Key:
    session_id  - The session ID
    request_id  - A specific request (batch) within the session.
   NO_INFOMSGS - Suppress all information messages (severity 0-10)

To find the request_ids for a given session id (@@spid = current session):

SELECT request_id
FROM sys.dm_exec_requests
WHERE session_id = @@spid

Examples

-- Display session # 52
DBCC INPUTBUFFER (52);
DBCC OUTPUTBUFFER (52); 

“A lawyer who represents himself has a fool for a client” ~ proverb