Question

On SQL Server 2005 i want to create a representation of the hour that my task was started. I have a datetime that is ‘2010-10-01 12:30:00.000′ which is the actual start time. What i would like to end up with is ’12:00′ which is the hour the task was started. Any good ideas on how to loose the ’30’ minutes?

Answer 1

declare @dt datetime 
set @dt = '2010-10-01 12:30:00.000'
select convert(char(5), dateadd(hour, datediff(hour, 0, @dt), 0), 108)

Result:

12:00

As a datetime

declare @dt datetime 
set @dt = '2010-10-01 12:30:00.000'
select dateadd(hour, datediff(hour, 0, @dt), 0)

Result:

2010-10-01 12:00:00.000