MDX Sort By Month - mdx

Question

I am trying to put together my first query for a pentaho CDE dashboard chart.
Starting Query
WITH
SET [~COLUMNS] AS
{[DimProgram.Name].[Name].MEMBERS}
SET [~ROWS] AS
{[DimTime.CalendarYearMonth].[CalendarYearMonth].MEMBERS}
SELECT
NON EMPTY
CrossJoin
(
[~COLUMNS]
,{[Measures].[SubmissionCount]}
) ON COLUMNS
,NON EMPTY
[~ROWS] ON ROWS
FROM [PSE_FactSubmission];
This query returns the data I want but needs to be tweaked a bit to be ready for actual use. I want to sort by date descending and limit to only the past 12 months.
I've read several webpages on sorting in MDX, but haven't been able to put together a query that will run. When the query doesn't run just an "Error" prompt.
Ordering Attempt
WITH
SET [~COLUMNS] AS
{[DimProgram.Name].[Name].MEMBERS}
SELECT
NON EMPTY
CrossJoin
(
[~COLUMNS]
,{[Measures].[SubmissionCount]}
) ON COLUMNS
,NON EMPTY
Order
(
[DimTime.CalendarYearMonth].[CalendarYearMonth].MEMBERS
,[DimTime.CalendarYearMonth].CurrentMember.Member_Key
,DESC
) ON ROWS
FROM [PSE_FactSubmission];
Any tips on sorting or how to limit to the past X months would be very appreciated.

Answer 1

Usually a Date/Time dimension is ordered naturally in the cube design so there is no need to use Order. I don't need to with the cubes I use.
If it is in a strange order in the cube then you need to break (B) this hierarchical order by using BASC or BDESC:
WITH
SET [~COLUMNS] AS
{[DimProgram.Name].[Name].MEMBERS}
MEMBER [Measures].[orderMeas] AS
[DimTime.CalendarYearMonth].CurrentMember.Member_Key
SET [~ROWS] AS
Order
(
[DimTime.CalendarYearMonth].[CalendarYearMonth].MEMBERS
,[Measures].[orderMeas]
,BASC
)
SELECT
NON EMPTY
CrossJoin
(
[~COLUMNS]
,{[Measures].[SubmissionCount]}
) ON COLUMNS
,NON EMPTY
[~ROWS] ON ROWS
FROM [PSE_FactSubmission];
To get the most recent 12 months you can use the Tail function - better to use it against NonEmpty months:
WITH
SET [~COLUMNS] AS
{[DimProgram.Name].[Name].MEMBERS}
MEMBER [Measures].[orderMeas] AS
[DimTime.CalendarYearMonth].CurrentMember.Member_Key
SET [~ROWS] AS
Order
(
NonEmpty
(
[DimTime.CalendarYearMonth].[CalendarYearMonth].MEMBERS
,[Measures].[SubmissionCount]
)
,[Measures].[orderMeas]
,BASC
)
SELECT
NON EMPTY
CrossJoin
(
[~COLUMNS]
,{[Measures].[SubmissionCount]}
) ON COLUMNS
,NON EMPTY
Tail
(
[~ROWS]
,12
) ON ROWS
FROM [PSE_FactSubmission];
Hi Andrew - against AdvWrks I've got the following running without any errors. I needed to change Member_Key to MemberValue:
WITH
SET [~COLUMNS] AS
[Product].[Product Categories].[Product]
MEMBER [Measures].[orderMeas] AS
[Date].[Calendar].CurrentMember.MemberValue
SET [~ROWS] AS
Order
(
NonEmpty
(
[Date].[Calendar].[Month].MEMBERS
,[Measures].[Internet Sales Amount]
)
,[Measures].[orderMeas]
,ASC
)
SELECT
NON EMPTY
CrossJoin
(
[~COLUMNS]
,{[Measures].[Internet Sales Amount]}
) ON COLUMNS
,NON EMPTY
Tail
(
[~ROWS]
,12
) ON ROWS
FROM [Adventure Works];