SHOW the no.of REDO SWITCHES per HOUR

SHOW the no.of REDO SWITCHES per HOUR

SET PAUSE ON
SET PAUSE 'Press Return to Continue'
SET PAGESIZE 60
SET LINESIZE 300

SELECT to_char(first_time, 'yyyy - mm - dd') aday,
           to_char(first_time, 'hh24') hour,
           count(*) total
FROM   gv$log_history
WHERE  thread#=&EnterThreadId
GROUP BY to_char(first_time, 'yyyy - mm - dd'),
              to_char(first_time, 'hh24')
ORDER BY to_char(first_time, 'yyyy - mm - dd'),
              to_char(first_time, 'hh24') asc;