Help in creating MDX Calculated Member using attributes from multiple Dimension

Question

Hi All,
First of all my knowledge on MDX is basic. In one of our projects, there is a requirement to create calculated member (similar to derived fields in SQL) which is more of a dimension attribute and not really a calculated member. Due to IP issues I cannot paste
the actual queries but I will provide an SQL Query equivalent to what I am trying to achieve:
Select P.Product, Case When ISNULL(FS.ArtistName,'') = '' Then P.ArtistName Else FS.ArtistName End Artist
 From
dbo.FactMusicSales FS
Join dbo.dimProduct P
on P.DimProductKey =  FS.DimProductKey
We are trying to replicate the logic for derving the "Artist" field using MDX script.
We are running into issues while trying to build an MDX expression using the above logic. The main issue being that the new field/member "Artist" would not be calculated unless its elements are selected (FS.ArtistName, P.ArtistName). Besides this
we are also unable to place this new member in a different folder other than a sub folder under the measures. Any pointers to solving this would be really helpful.
Thanks in Advance,
Venki

Answer 1

Hi Venki,
According to your description, you need to create calculated member (similar to derived fields in SQL) which is more of a dimension attribute and not really a calculated member, right?
In your scenario, you needn't to achieve this requirement by using MDX. You can use a named query on your data source view. A named query is a SQL expression represented as a table. In a named query, you can specify an SQL expression to select rows and columns
returned from one or more tables in one or more data sources. So in you scenario, you can use your query on the DSV, and then use the modified table to create a dimension.
http://msdn.microsoft.com/en-IN/library/ms175683.aspx
Regards,
Charlie Liao
TechNet Community Support