ओरेकल एसक्यूएल - ओरेकल में एकाधिक कॉलम में तिथियों के आधार पर गणना कैसे प्राप्त करें?

PIVOT ऑपरेटर का उपयोग करके ऐसा करने का एक तरीका यहां दिया गया है।

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.