select a.sql_text SQL语句, 

       b.etime 执行耗时, 

       c.user_id 用户ID,

       c.SAMPLE_TIME 执行时间, 

       c.INSTANCE_NUMBER 实例数,

       u.username 用户名, a.sql_id SQL编号

  from dba_hist_sqltext a,

       (select sql_id, ELAPSED_TIME_DELTA / 1000000 as etime

          from dba_hist_sqlstat

         where ELAPSED_TIME_DELTA / 1000000 >= 1) b,

       dba_hist_active_sess_history c,

       dba_users u

 where a.sql_id = b.sql_id

   and u.username = 'SCOTT'

   and c.user_id = u.user_id

   and b.sql_id = c.sql_id

 order by  SAMPLE_TIME desc, 

  b.etime desc;