获取某时间段内的top session_id+session_serial#
set linesize 260 pagesize 10000
col nvl(event,'ON CPU') for a40
select *
from (select session_id,session_serial#,sql_id,nvl(event,'ON CPU'),count(*)
from gv$active_session_history
where sample_time between
to_date('&date1', 'yyyy-mm-dd hh24:mi:ss') and
to_date('&date2', 'yyyy-mm-dd hh24:mi:ss')
and inst_id in (select instance_number from v$instance)
group by session_id,session_serial#,sql_id,nvl(event,'ON CPU')
order by count(*) desc)
where rownum
