DATEDIFF II

Hello,

Some question has already been answered here, but I'm still getting a hard time, maybe you could enlighten me... (First answer: http://social.msdn.microsoft.com/Forums/en-US/transactsql/thread/e749bf4a-0a28-4567-8836-acd3cfb656a3/#565332a7-a01f-4b50-9b83-e095cb3be600)

Here's what I have:

100A                A                  01-01-2013

100A                B                  02-01-2013

100A                C                  03-01-2013

200B                A                  01-01-2013

200B                B                  03-01-2013

200B                C                  06-01-2013

What I would want is to have a listing like this:

ProductKey       Def               DateTime               Days       DaysSum

100A                A                  01-01-2013            0            0

100A                B                  02-01-2013            1            1

100A                C                  03-01-2013            1            2

200B                A                  01-01-2013            0            0

200B                B                  03-01-2013            2            2

200B                C                  06-01-2013            2            4

The first column would be the datediff between each date, and the second a sum for each productkey.

And in the end I have to export only selected values based on an parameter (let's say at least 3)

I'm using Sql Server 2008.

Thanks.