WORKFLOW RELATED :

to set the overrides from backend:

update fnd_svc_comp_param_vals
set    parameter_value = '&EnterEmailID'
where  parameter_id =
( select parameter_id
 from   fnd_svc_comp_params_tl
 where  display_name = 'Test Address');

TO SET THE OVERRIDE ADDRESS in WORKFLOW MAILER :

--Set the override address to  'xyz@abc.com' , using the following script:
--Login to the application server..
cd $FND_TOP/sql

@afsvcpup.sql

--Check the workflow services using the below query.
set pagesize 400
set linesize 120
set pagesize 50
column COMPONENT_NAME format a45
column STARTUP_MODE format a15
column COMPONENT_STATUS format a15
select fsc.COMPONENT_NAME,fsc.STARTUP_MODE,fsc.COMPONENT_STATUS
from APPS.FND_CONCURRENT_QUEUES_VL fcq, fnd_svc_components fsc
where fsc.concurrent_queue_id = fcq.concurrent_queue_id(+)
order by COMPONENT_STATUS , STARTUP_MODE , COMPONENT_NAME;

How to get active session ------------

select sid,serial#,module,machine,last_login_time from v$session where status='ACTIVE'

TO FIND OUT LONGOPS SESSION :===

SELECT a.sid, a.serial#, b.username , opname OPERATION, target OBJECT,
 TRUNC(elapsed_seconds, 5) "ET (s)", TO_CHAR(start_time, 'HH24:MI:SS') start_time,
 ROUND((sofar/totalwork)*100, 2) "COMPLETE (%)"
 FROM v$session_longops a, v$session b
 WHERE a.sid = b.sid AND b.username not IN ('SYS', 'SYSTEM') AND totalwork > 0
 ORDER BY elapsed_seconds;

TO GET INVALID OBJECTS:

select owner,object_name,object_type from dba_objects where status='INVALID'

TO FIND OUT SESSION FROM CONCURRENT REQ ID :

SELECT a.request_id, d.sid, d.serial# ,d.osuser,d.process , c.SPID
FROM apps.fnd_concurrent_requests a,
apps.fnd_concurrent_processes b,
v$process c,
v$session d
WHERE a.controlling_manager = b.concurrent_process_id
AND c.pid = b.oracle_process_id
AND b.session_id=d.audsid
AND a.request_id in ('27222682','27223376');

TO FIND TABLESPACE AGAINST TABLE :

select table_name,tablespace_name from all_tables where table_name = 'EMP';