hi,
      Here has a example:
               select  province_name, count(user_id) from dw.fact_1 as a 
               right  join  dim.dim1  as b on    
b.province_id=a.rev_addr_province_id
               group by province_name
               
      I choose  province_id, rev_addr_province_id, province_name  as Dimension. 
But  when I  save the cube it  has a error.The error content:
              Error Message

         Cannot find rowkey column PROVINCE_ID in cube
   
    question :
               If I remove   province_id from Dimension, the cube builded 
successed. But  how to join dim1 , to realize that  example?
     

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