How to find out all active sessions details?

set lines 180 pages 20000
col sid format 999999
col osuser format a15
col username format a12
col sql_text format a45
col event format a28
col program format a28
select distinct b.sid, c.osuser, c.username, d.sql_text, b.event, nvl(nvl(c.program,c.module),c.machine) Program   from v$session_wait b, v$session c, v$sql d where b.sid = c.sid and c.sql_address = d.address and c.last_call_et > 1 and c.status = 'ACTIVE';