title: Create metric in MicroStrategy that returns Min Date
body: <p>I have a database that maintains history of item receipts. I would like to create a Metric that returns the first receipt date corresponding to an item. The challenge I'm having is that null values are possible and converted to date 1/1/1900 (on a given date the item existed but had not been received). How can I return the next date in value list if first date is 1/1/1900?</p>