Her er en måde at gøre dette ved at bruge PIVOT-operatoren.
with
inputs (REGID, SESSION_START_DATETIME, USAGEID) as (
select 1 , to_date('7/11/2016', 'mm/dd/yyyy'), 1 from dual union all
select 1 , to_date('6/10/2016', 'mm/dd/yyyy'), 1 from dual union all
select 1 , to_date('6/09/2016', 'mm/dd/yyyy'), 1 from dual union all
select 1 , to_date('5/04/2016', 'mm/dd/yyyy'), 1 from dual union all
select 1 , to_date('5/04/2016', 'mm/dd/yyyy'), 1 from dual union all
select 1 , to_date('5/04/2016', 'mm/dd/yyyy'), 1 from dual
)
select * from (
select regid, session_start_datetime,
case when trunc(sysdate) - session_start_datetime between 0 and 30
then '0-30_days_usagecount'
when trunc(sysdate) - session_start_datetime between 31 and 60
then '31-60_days_usagecount'
when trunc(sysdate) - session_start_datetime between 61 and 90
then '61-90_days_usagecount'
end
as col
from inputs
)
pivot ( count(session_start_datetime)
for col in ( '0-30_days_usagecount', '31-60_days_usagecount',
'61-90_days_usagecount'
)
)
;
REGID '0-30_days_usagecount' '31-60_days_usagecount' '61-90_days_usagecount'
---------- ---------------------- ----------------------- -----------------------
1 1 2 3
1 row selected.