In SQL how to update sum of total time with an existing time in a stored procedures

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for example, existing time is 20hours and that record will be update to 28hours by adding 8 hours
in an update stored procedure.

What I have tried:

TotalTime = CONVERT(TIME, CONVERT(NVARCHAR, (DATEADD(SECOND, DATEDIFF(SECOND, 0, @TotalTime), @OldTotalTime))))

Posted 6-May-21 0:32am

Mani kanta 2021

Updated 11-May-21 10:46am

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Richard MacCutchan 6-May-21 6:57am

What is wrong with just adding 8 to the total hours?

Mani kanta 2021 6-May-21 7:11am

It shows 24hr format and then the result is 4hours

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OriginalGriff · Answer 1 · 2021-05-06T01:02:00

What the heck is that supposed to do? Why are you converting to seconds, adding the old seconds, converting that to a string (hoping that the server settings don't change), and then converting the string to a TIME value?

The simplest solution is: don't use TIME at all. Instead, use an integer which represents the smallest interval you are interested in: if your cumulative time is whole hours, then an integer value of 1 is an hour. If your cumulative time is in "15 minute blocks", then a value of 1 is one minute. And so on.
Then it's trivial:

SQL

@TotalTime = @TotalTime + 8 * 60

to add eight hours to a minute based count.

To convert back to your units is trivial: divide and modulus make it so!

Jamshaid Riaz · Answer 2 · 2021-05-11T10:46:00

Solution 2

Try this:

SQL

<pre>SELECT FORMAT(totaltime,'hh') + 8

This works in SQL server 2012 and above

Posted 11-May-21 10:46am

Jamshaid Riaz