Oracle显示正在执行的sql

SELECT osuser, username, sql_text from v$session a, v$sqltext b 
where a.sql_address =b.address order by address, piece;

select s.USERNAME, sq.SQL_TEXT, s.LAST_CALL_ET
  from v$open_cursor oc, v$sql sq, v$session s
where oc.HASH_VALUE = sq.HASH_VALUE
   and s.SID = oc.SID
   and s.STATUS = 'ACTIVE';