How to find the maximum user doing commit operation or transaction in Oracle DB

Script helpful in tracking the number of transactions in the database.

Note: It used the AWR tables like dba_hist_sysstats or dba_hist_snapshot. So, need the license for access.

col STAT_NAME for a20
col VALUE_DIFF for 9999,999,999
col STAT_PER_MIN for 9999,999,999
set lines 200 pages 1500 long 99999999
col BEGIN_INTERVAL_TIME for a30
col END_INTERVAL_TIME for a30
set pagesize 40
set pause on
select hsys.SNAP_ID,
 hsnap.BEGIN_INTERVAL_TIME,
 hsnap.END_INTERVAL_TIME,
 hsys.STAT_NAME,
 hsys.VALUE,
 hsys.VALUE - LAG(hsys.VALUE,1,0) OVER (ORDER BY hsys.SNAP_ID) AS 
"VALUE_DIFF",
 round((hsys.VALUE - LAG(hsys.VALUE,1,0) OVER (ORDER BY 
hsys.SNAP_ID)) /
 round(abs(extract(hour from (hsnap.END_INTERVAL_TIME -
hsnap.BEGIN_INTERVAL_TIME))*60 +
 extract(minute from (hsnap.END_INTERVAL_TIME -
hsnap.BEGIN_INTERVAL_TIME)) +
 extract(second from (hsnap.END_INTERVAL_TIME -
hsnap.BEGIN_INTERVAL_TIME))/60),1)) "STAT_PER_MIN"
from dba_hist_sysstat hsys, dba_hist_snapshot hsnap
where hsys.snap_id = hsnap.snap_id
and hsnap.instance_number in (select instance_number from v$instance)
and hsnap.instance_number = hsys.instance_number
and hsys.STAT_NAME='user commits'
order by 1;