不是自己写的，是分享别人的。

with his as (

select sql_id, sql_exec_start,user_id

    from dba_hist_active_sess_history t

where  user_id = (select user_id from dba_users where username = 'JMSS')

and t.sql_exec_start between to_date('2017-09-09 080000','yyyy-mm-dd hh24miss') 

and to_date('2018-09-09 230000','yyyy-mm-dd hh24miss') order by 2 desc

)

select * from dba_hist_sqltext where sql_id in (select sql_id from his);

其中username是某个用户的用户名。