Access 97 Help

I’m an Access newbie with no VB or SQL knowledge. However I’m a pretty quick study and have be able to teach myself the basics of Access 97, but there is one thing I can’t quite wrap my mind around. I need to be able to display Month to Date information for a particular date in a query. I enter daily information and can easily display a total for that information for a particualr month by using the “group by” and “sum” on the total lines of my select query, but how do I get a running MTD total by day?