Aggregating Ranges of Dates
Another useful form uses a range of members aggregated by %OR:
%OR(member_expression_1:member_expression_n)
The expression member_expression_1:member_expression_n returns all members from member_expression_1 to member_expression_n, inclusive. This form is particularly useful with time levels, because you can use it to express a range of dates in a compact form.
For time levels, you can also use the special NOW member. The following expression aggregates sales records from 90 days ago through today:
%OR(DateOfSale.DaySold.[NOW-90]:DateOfSale.DaySold.[NOW])
Or use the following equivalent form:
%OR(DateOfSale.DaySold.[NOW-90]:[NOW])
You can also use the PERIODSTODATE function to get a range of dates. For example, the following expression gets the range of days from the start of the current year to today and aggregates these days together:
%OR(PERIODSTODATE(DateOfSale.YearSold,DateOfSale.DaySold.[NOW]))
