Need total worked hours of each employee

Question

Hi all
I need the total work hour for each employee
create table pde(empno number(10),act_hour varchar(10 byte));
Table created
insert into pde values(211,'12:20');
insert into pde values(211,'06:00');
insert into pde values(213,'07:00');
insert into pde values(213,'07:20');
WITH  got_total_hours     AS
     SELECT SUM (   TO_NUMBER (SUBSTR (act_hour, 1, 2))
                + ( TO_NUMBER (SUBSTR (act_hour, 4, 2))
                  / 60
                ) AS total_hours 
     from      pde
SELECT        TO_CHAR (FLOOR (total_hours))
       || ':'
       || TO_CHAR ( MOD (total_hours, 1) * 60
              , 'fm00'
               )     AS hh_mm,empno,act_hour
FROM     got_total_hours ,pde
this is the output i am getting 
HH_MM  EMPNO  ACT_HOUR
32:40     211     12:20
32:40     211     06:00
32:40     213     07:00
32:40     213     07:20
i require    HH:MM EMPNO ACT_HOUR
               18:20  211      12:20
               18:20  211      06:00
               14:20  213      07:00
               14:20  213      07:20
kindly help meThanking in advance
regards,
oracleuser

Answer 1

Hi Ravi,
Your solution works perfectly fine but there is a prob when i incorporate ur solution in the main query
WITH temp AS
  (SELECT employee_number,
    act_hour   ,
    SUM(to_number(regexp_substr(act_hour,'[^:]+',1,1))*60+to_number(regexp_substr(act_hour,'[^:]+',1,2))) over (partition BY employee_number) tot
     FROM nap_PUNCH_DATA_EMP_LIST trn where DATE_ENTRAY between '23-Aug-2009' and  '24-Aug-2009'
SELECT employee_number,act_hour,ROUND(tot/60)||':'||mod(tot,60) tothours FROM temp
o/p i am getting is
EMPLOYEE_NUMBER     ACT_HOUR             TOTHOURS
408                            06:31                         07:31
408                            00:00                         07:31
410                            18:12                          30:59 ------SUM of 18:12 and 11:47 should be 29:59
410                             11:47                          30:59
this is working correctly for majority of employee_numbers with exception of some employee_numberskindly help
regards,
oracle user
Edited by: makdutakdu on Jan 4, 2010 12:45 PM