_age
Returns a number by subtracting "timestamp_expression" from today's date.
Syntax
_age ( timestamp_expression )
Example
_age ([Query1].[Date]), where [Query1].[Date] is March 2, 2004, and
today is July 8, 2009
Result
50,406, where 5 is the number of years, 04 is the number of months, and 06 is the number of days.