title: How to get all level of data from a dimension by MDX query
body: <p>how to get all sub level of data ?
  If Category and Date dimensions, if they have
               Category
                    -Sub Category
                          -Group
                              -Sub Group
  and,
               Date
                    -Quoter
                       -Month
                           -Week</p>
  
  <p>level like this.</p>
  
  <p>If it so how to gel all Category and all Date levels data by MDX query?</p>