récupérer un historique de session
spool hist_sess.html
set markup html on
alter session set nls_timestamp_format='YYYY-MM-DD HH24:MI';
select * from DBA_HIST_ACTIVE_SESS_HISTORY where sample_time between '2020-03-09 18:00' and '2020-03-12 17:01';
set markup html off
spool off