Compare measures by dynamic Date filter.

Hello,
I have Date dimension with Hierarchy Year.Quarter.Month and Measure.Amount.
I would like to know if it is possible to compare measures on selected Date dimension level comparing 1 year before.
For example there are values
Month Amount
2012-01 10
2012-02 20
2012-03 30
2013-01 40
2013-02 50
2013-03 60
When I browse cube I need to create Calculated member (Amount_last_period) like the following:
Month Amount
Amount_last_period
2012-01 10
2012-02 20
2012-03 30
2013-01 40
10
2013-02 50
20
2013-03 60
30
I need to do it dynamically. If I choose to output quarters' amount it is need to compare quarter's data.
Any help or thoughts would be helpful.

Hi VB,
You can use ParallelPeriod in combination with Currentmember.
An example from the AW cube:
WITH
MEMBER [Measures].[Prior year Reseller Sales Amount] AS
ParallelPeriod(
[Date].[Calendar].[Calendar Year],
1,
[Date].[Calendar].CurrentMember
[Measures].[Reseller Sales Amount]
,FORMAT="Currency"
SELECT
([Measures].[Reseller Sales Amount]),
([Measures].[Prior year Reseller Sales Amount])
} ON COLUMNS,
{[Date].[Calendar].[Calendar Quarter]
} ON ROWS
FROM [Adventure Works]
Philip,

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Hi
i had question just now and got the right answer for it. That was great. However, I ran and the result was not right.
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I have three dimensions: Invoice Date, Licence Start Date, Licence End date. I need to add a condition saying only sales with licence start date is equal or early than current licence end date for the below query.
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Hi Sqlma,
According to your description, you are going to sum the measure for the members with the dondition that licence start date is equal or early than current licence end date for the below query, right?
In this case, you need filter out the members that licence start date is equal or early than current licence end date for the below query. And then sum the total measures using sum function. I have tested it on my local environment, here is a sample query
for you reference.
with set [aa]
as
filter
([Product].[Product Categories].members,
[Measures].[Internet Sales Amount]>30000)
member [measures].[b]
as
sum([aa],[Measures].[Internet Sales Amount])
select {[Measures].[Internet Sales Amount],[measures].[b]} on 0,
[aa] on 1
from [Adventure Works]
where [Date].[Calendar].[Calendar Year].&[2008]
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