Allow downloading of all campaign results based on a given time period

We ask that you create a button where we can download to one CSV file / Excel file campaign results of several campaigns together.  We run various campaigns for various teams in the company and we need to be able to report the clicks and views by department (campaign) based a range of dates.  We sometimes look at things by month, by quarter, we have at least 10 campaigns running at the same time so the manual process of building the data is very difficult.