How to find current running sqls in oracle

select sesion.sid,
       sesion.username,
       optimizer_mode,
       hash_value,
       address,
       cpu_time,
       elapsed_time,
       sql_text
  from v$sqlarea sqlarea, v$session sesion
where sesion.sql_hash_value = sqlarea.hash_value
   and sesion.sql_address    = sqlarea.address
   and sesion.username is not null;

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