Query Problem - Group data by time

Question

I have statistic data that record by time such as
Time Data
19-MAR-06 10:01 100
19-MAR-06 10:02 100
19-MAR-06 10:03 100
19-MAR-06 10:04 100
19-MAR-06 10:05 100
19-MAR-06 10:06 100
I would like to group data every five minute start from 00:00 to 23:59 for example the result should be
Time Sum(Data)
19-MAR-06 00:00 0
19-MAR-06 00:05 0
19-MAR-06 10:00 400
19-MAR-06 10:05 200
Any suggest?

Answer 1

SELECT times.all_time, NVL(real.sum,0)
FROM
   (SELECT  mintim + (level * (1/12/24)) - 1/12/24 AS all_time
    FROM    ( SELECT trunc(MIN(time),'DD') mintim
                   , trunc(MAX(time),'DD') + 1 maxtim
              FROM   testtab
    CONNECT BY mintim + (level * (1/12/24)) - 1/12/24 <= maxtim
    ) times,
   (SELECT TRUNC(time,'HH24') +
          (TRUNC(TO_CHAR(time,'MI')/5)*5)/24/60 real_time, sum(data) sum 
    FROM testtab                      
    GROUP BY  TRUNC(time,'HH24') + (TRUNC(TO_CHAR(time,'MI')/5)*5)/24/60) real
WHERE times.all_time = real.real_time(+)  
ORDER BY times.all_time
19-Mrz-2006     0
19-Mrz-2006 0:05:00     0
19-Mrz-2006 0:10:00     0
19-Mrz-2006 0:15:00     0
19-Mrz-2006 9:45:00     0
19-Mrz-2006 9:50:00     0
19-Mrz-2006 9:55:00     0
19-Mrz-2006 10:00:00     400
19-Mrz-2006 10:05:00     200
19-Mrz-2006 10:10:00     0
19-Mrz-2006 23:45:00     0
19-Mrz-2006 23:50:00     0
19-Mrz-2006 23:55:00     0
20-Mrz-2006     0