How do you calculate the number of weeks between two dates?

Question

How do you calculate the number of weeks between two dates?

for example as follows

Declare @StartDate as DateTime = \"01 Jan 2009\";
Declare @EndDate         


        

Answer 1

Use the Datediff function. datediff(ww,@startdate,@enddate)

the ww tells the function what units you require the difference to be counted in.

http://msdn.microsoft.com/en-us/library/ms189794.aspx