sum integers fields that occur on the same day in drupal views

Hi,

I have a view that includes 2 fields post date and an integer.

I want to create query that displays all integers that occur on the same day as one sum instead each individual day and number.

combine like this :

Date
August 12, 2011
Twitter Followers:
568
Date
August 12, 2011
Twitter Followers:
568

so this would display one date instead and the sum of the 2 integers.

Let me know if I can clarify in any way

thanks

Nick