column dt format a10
column dy format a7
column total format 999
column h0 format 99
column h1 format 99
column h2 format 99
column h3 format 99
column h4 format 99
column h5 format 99
column h6 format 99
column h7 format 99
column h8 format 99
column h9 format 99
column h10 format 99
column h11 format 99
column h12 format 99
column h13 format 99
column h14 format 99
column h15 format 99
column h16 format 99
column h17 format 99
column h18 format 99
column h19 format 99
column h20 format 99
column h21 format 99
column h22 format 99
column h23 format 99
select to_char(first_time,'yyyy-mm-dd') dt,
to_char(first_time, 'dy') dy,
count(1) "total",
sum(decode(to_char(first_time, 'hh24'),'00',1,0)) "h0",
sum(decode(to_char(first_time, 'hh24'),'01',1,0)) "h1",
sum(decode(to_char(first_time, 'hh24'),'02',1,0)) "h2",
sum(decode(to_char(first_time, 'hh24'),'03',1,0)) "h3",
sum(decode(to_char(first_time, 'hh24'),'04',1,0)) "h4",
sum(decode(to_char(first_time, 'hh24'),'05',1,0)) "h5",
sum(decode(to_char(first_time, 'hh24'),'06',1,0)) "h6",
sum(decode(to_char(first_time, 'hh24'),'07',1,0)) "h7",
sum(decode(to_char(first_time, 'hh24'),'08',1,0)) "h8",
sum(decode(to_char(first_time, 'hh24'),'09',1,0)) "h9",
sum(decode(to_char(first_time, 'hh24'),'10',1,0)) "h10",
sum(decode(to_char(first_time, 'hh24'),'11',1,0)) "h11",
sum(decode(to_char(first_time, 'hh24'),'12',1,0)) "h12",
sum(decode(to_char(first_time, 'hh24'),'13',1,0)) "h13",
sum(decode(to_char(first_time, 'hh24'),'14',1,0)) "h14",
sum(decode(to_char(first_time, 'hh24'),'15',1,0)) "h15",
sum(decode(to_char(first_time, 'hh24'),'16',1,0)) "h16",
sum(decode(to_char(first_time, 'hh24'),'17',1,0)) "h17",
sum(decode(to_char(first_time, 'hh24'),'18',1,0)) "h18",
sum(decode(to_char(first_time, 'hh24'),'19',1,0)) "h19",
sum(decode(to_char(first_time, 'hh24'),'20',1,0)) "h20",
sum(decode(to_char(first_time, 'hh24'),'21',1,0)) "h21",
sum(decode(to_char(first_time, 'hh24'),'22',1,0)) "h22",
sum(decode(to_char(first_time, 'hh24'),'23',1,0)) "h23"
from v$log_history
group
by to_char(first_time,'yyyy-mm-dd') ,
to_char(first_time, 'dy')
order
by 1;
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