SQL to display SQL history

This to display all SQL statements processed in Oracle DB withing a certain range of time and coming from certain machines:

select a.sql_id,a.sql_text,b.cnt from dba_hist_sqltext a, 
(
select sql_id,count(1) cnt from 
(
select session_id,sql_id,machine,sample_time,count(1) from 
(
select * from dba_hist_active_sess_history
where 
sample_time between to_date('19/06/2013 07:00','dd/mm/yyyy hh24:mi') and to_date('19/06/2013 10:00','dd/mm/yyyy hh24:mi')
and program = 'JDBC Thin Client' 
and machine like 'myhost1%'
--and rownum < 10
)
where sql_id is not null
group by session_id,sql_id,machine,sample_time
order by sample_time asc
) group by sql_id) b
where a.sql_id(+)=b.sql_id

if you simply want the active sessions:

select * from dba_hist_active_sess_history
where 
sample_time between to_date('19/06/2013 07:00','dd/mm/yyyy hh24:mi') and to_date('19/06/2013 10:00','dd/mm/yyyy hh24:mi')
and program = 'JDBC Thin Client' 
and machine like 'myhost1%'