Problem in filtering the records in Query

Question

Dear Gurus,
I am struck with a problem of filtering data and am not able to visualize the solution so need a solution.
so here is the requirement:
I have a multiprovider with 3 infocubes.
All these infocubes have a dimension names product family and in it there is a infoobject named FAMILY & it is having a attribute named DATE and DATE attribute is not a navigational attribute of FAMILY.
Example:
family : A
attribute date: #
for period: 011.2010
family : A
attribute date: #
for period: 012.2010
family : A
attribute date:01.01.2011
for period: 001.2011
family : A
attribute date: #
for period: 002.2011
if user run the query in 012.2010 i mean december 2010 then the above two record should be displayed & if he run the query in jan 2011 then only jan record should be shown because there a date in it & old record should not come. again if he run the query in feb 2011 then only the records for jan and feb should come old record before the date should not come.
I mean once the value show up in the attribute date it should not pick old values but only pick new values.
Thanks to all!

Answer 1

Hi Mario,
              When I format date as DSTR(@date_from & : &@date_to, 'dd.mm.yyyy') it shows blank values in the output for date field. rest of the values are displayed.
              Mario can you tell anything about second part of my question. I am getting 'Result' at output.