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how to sum time/Hours through SQL?

Kam__apexFeb 25 2015 — edited Feb 25 2015

Dear Friends

I have a table sh_detail and there are three fields hours1,hours2,hours3. all fields are varchar2 type.

data is like

hours1          hours2          hours3            total

02:45              00:18           01:25

00:38              01:45           00:00

02:15              02:00           00:15   

1. I want to add above three fields in total column

2. and want to sum every fields like select sum(hours1) from sh_detail.

Please help i will be thankful.

Regards.
This post has been answered by odie_63 on Feb 25 2015
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