How to calculate difference in hours (decimal) between two dates in SQL Server?

Question

I have to calculate the difference in hours (decimal type) between two dates in SQL Server 2008.

I couldn\'t find any useful technique to convert datetime to decimal

Answer 1

DATEDIFF(minute,startdate,enddate)/60.0)

Or use this for 2 decimal places:

CAST(DATEDIFF(minute,startdate,enddate)/60.0 as decimal(18,2))