Time Stamp Calculation

Hi,
I am using Oracle Database version 11.2.1 and would like to calculate the time difference in minutes between start_date, start_time and end_date, end_time. The date is stored in a seperate column to the time. Also the time is stored as a number.
Please see the test scripts below:
create table test
(start_date date,
start_time number,
end_date date,
end_time number)
insert into test values('20-JAN-2012', 103413, '01-FEB-2012', 110917);
insert into test values('01-MAR-2012', 091734, '01-MAR-2012', 103555);
insert into test values('19-APR-2012', 103413, '20-APR-2012', 125012);
insert into test values('13-JUL-2012', 123432, '13-JUL-2012', 123450);
insert into test values('01-MAY-2013', 164522, '06-MAY-2013', 110917);
insert into test values('10-MAY-2013', 085011, '13-MAY-2013', 135635);
Please note that the following exceptions need to be taken into account in the calculation
1. Exclude weekends (Sat & Sun)
2. Only calculate working hours from 08:45am to 17:15pm
Can anyone help?
Thanks

sliderrules wrote:
Hi,
The fields are stored this way in the system and are extracted as two seperate columns. Can the data and time be combined into one date field?Hi,
I agree with John that this is a really bad design. You actually don't need start_time and end_time as you can have all the information start_date and end_date.
i.e.:
update test
   set start_date = TO_DATE(TO_CHAR(start_date,'YYYYMMDD')||TO_CHAR(start_time,'fm000000'), 'YYYYMMDDHH24MISS')
     , end_date   = TO_DATE(TO_CHAR(end_date ,'YYYYMMDD')||TO_CHAR(end_time ,'fm000000'), 'YYYYMMDDHH24MISS');
select start_date, end_date
from test;
START_DATE            END_DATE
20/01/2012 10:34:13   01/02/2012 11:09:17
01/03/2012 09:17:34   01/03/2012 10:35:55
19/04/2012 10:34:13   20/04/2012 12:50:12
13/07/2012 12:34:32   13/07/2012 12:34:50
01/05/2013 16:45:22   06/05/2013 11:09:17
10/05/2013 08:50:11   13/05/2013 13:56:35 And for calculate your working hours you can have a look at this: {message:id=10655484}
Regards.
Al
Edited by: Alberto Faenza on May 21, 2013 2:11 PM
Added link for hours calculation

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Message Edited by rolfk on 08-18-2009 09:32 PM
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Kapitaine wrote:
> Hi, thanks for the reply.
>
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>
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time_stamped.vi ‏19 KB

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Yes you are right, Appending and adding Time Stamp will not be possible simultaneously.
Refer - this could help you
Dynamic Filename with TimeStamp
Dynamic Filename with TimeStamp
/people/william.li/blog/2006/04/18/dynamic-configuration-of-some-communication-channel-parameters-using-message-mapping
But some how you have to use mapping for it. Then if its allowed to use the mapping then as you have suggested, should have to go for two scenarios. No alternative,
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Time Stamp Calculation

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