Dividing HH:MM:SS by an integer

Question

I have a column, Col1, in the format HH:MM:SS, and an integer column Col2. I am trying to compute Col1 / Col2 in the format <

Answer 1

Assuming you are using sql server (2008 or higher), perhaps the following will clear things up for you:

-- starting with a string in HH:MM:SS format
declare @s varchar(8)
set @s = '12:00:00'

-- set a divisor
declare @d int
set @d = 2

-- divide the total seconds by the divisor
set @s = convert(time(0), dateadd(second, datediff(second, 0, @s) / @d, 0))

-- output the results   '06:00:00'
print @s

Note that you really should just keep time values in a time datatype to begin with, but there are implicit conversions allowed that will let you go back and forth like this.