how to enable trace for the session in oracle database

EXECUTE dbms_monitor.session_trace_enable (, , waits=>true, binds=>true); --->Check the trace file that would be created : SELECT s.sid,p.tracefile FROM v$session s JOIN v$process p ON s.paddr = p.addr WHERE s.sid in (); ---> Let it run for sometime --->and then disable the trace: EXECUTE dbms_monitor.session_trace_disable (session_id => , serial_num => );

How to find the RMAN backup run history or status

set linesize 500 pagesize 2000 col Hours format 9999.99 col STATUS format a10 select SESSION_KEY, INPUT_TYPE, STATUS, to_char(START_TIME,'mm-dd-yyyy hh24:mi:ss') as RMAN_Bkup_start_time, to_char(END_TIME,'mm-dd-yyyy hh24:mi:ss') as RMAN_Bkup_end_time, elapsed_seconds/3600 Hours from V$RMAN_BACKUP_JOB_DETAILS order by session_key;