Identify database idle sessions

set linesize 140
col username format a15
col idle format a15
col program format a30

PROMPT Enter the number of minutes for which the sessions should have been idle:
PROMPT

select
sid,username,status,
to_char(logon_time,'dd-mm-yy hh:mi:ss') "LOGON",
floor(last_call_et/3600)||':'||
floor(mod(last_call_et,3600)/60)||':'||
mod(mod(last_call_et,3600),60) "IDLE",
program
from
v$session
where
type='USER'
and (LAST_CALL_ET / 60) > &minutes
order by last_call_et;