Divide measure by dimension attribute?

Question

Hi, I have a cube containing a count of emergency accident attendances (measures.count) which links to a location dimension (dim_Location) via Loc_ID. The dim_Location dimension contains an attribute which is the number of people living at that location. Is it possible to divide the measures.count value by the value of the dim_Location.PeopleInLocation attribute? If so, what would the MDX look (roughly) like?
[Fact_Attendance]
  [Location_ID]
  ... (other columns)
[dim_Location]
  [ID]
  [LocationDescription]
  [PeopleInLocation]
The report should look roughly like this:
           | #Attend... (count) | PeopleInLoc | #Attend / People
North-East | 5732               | 571         | 10.04
North      | 10885              | 895         | 12.16
East       | 2659               | 344         |  7.73
I could put PeopleInLocation into the fact table as a measure but it seems inefficient to do so since it would be duplicated many times...
Thanks
N. Brown

Answer 1

 mschroeter wrote:
In your MDX you could declare a member like this:
WITH MEMBER [Measures].[PeopleInLoc] AS '[dim_Location].[PeopleInLocation].CURRENTMEMBER.UNIQUENAME'
and then reference that as a measure in the SELECT part of the MDX query:
WITH MEMBER [Measures].[PeopleInLoc] AS '[dim_Location].[PeopleInLocation].CURRENTMEMBER.UNIQUENAME'
select
    {Measures.Attendance / Measures.PeopleInLoc} on columns
So, it sounds like there is a way to access the name of an attribute and make it a measure. How would you do something like this with dates and calculating the number of days (or years, and such) that has elapsed?
For example, consider the following sceanario.
(1) I have a time dimension that tells what month we are in.
(2) I have an employee dimension that has birthday as an attibute.
Now, I want to create a calculated measure that somehow computes the person's age for the current month. The components are there for me to do the math, but I'm not sure how you can do this.