I have a database field that is defined as a "text" field but is stored as a time field "00:00:29", etc.

What I need to do is be able to accumulate this field value and I'm not sure what functions I need to use to do that.

For ex:

00:00:49
00:12:33
00:04:19
01:02:29

I need to be able to accumulate these values and give me the total time.

Thanks,