Convert hours:minutes to seconds where hours > 24

Question

I have a string 47:45. That means 47 hours, 45 minutes. I want to convert that string to seconds.

select datediff(second, '00:00','47:45') <-- does not work

what is the quickest way to find the 171.900 seconds I am looking for?

Answer 1

One way to do this would by delimiting the semicolon separated values and multiplying the minutes part by 60 and hours by 3600 and adding the result. Thanks!