Convert seconds to "00:00:00" format - SQL server

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I have a report in which i have to calculate overall worked hours by any employee in a week. The report reflects hours more than 24 hours(or 86400 seconds). I want to convert all the seconds into "00:00:00" format keeping the format of the columns as datetime or time so that I can do further analysis using the time field.

This code gives me what I need however the above converts the seconds in INT to varchar which is not what I need for the report. I need the output to be in datetime/time format which can give me results like '40:00:00' for the given example.
I hope I am able I have provided all the information. Please help as I am struggling with this from many days.

What I have tried:

Below is what I have tried so far:

Declare @WorkTimeInSeconds int
Set @WorkTimeInSeconds = 144000 --This value is an example. Mostly values are above 86400 seconds
Select ActualHoursWorked =       convert(varchar,(@WorkTimeInSeconds)/3600)
            + ':' + right( '0' + convert(varchar,((@WorkTimeInSeconds) %3600)/60),2)
            + ':' + right( '0' + convert(varchar,(@WorkTimeInSeconds) %60),2)

Posted 19-Jan-17 22:26pm

AnkurJain14

Updated 19-Jan-17 22:37pm

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OriginalGriff · Answer 1 · 2017-01-19T22:37:00

The problem is that 00:00:00 is not a date time format - it's a timespan. A date time value requires a date, and is limited to 23:59:99 as the time component as well, so you can't just say "90,909 seconds is a datetime of 25:15:09" because that isn't a valid datetime value.
I'd either return it as a NVARCHAR or a number of seconds and let the presentation software sort out exactly what it wants to display. (Or possibly as three separate INT values, but that's equally messy).