MDX Query for Average customer first sale amount for each year

Question

Hello,
I new to MDX, and I am looking to build a query that would get all the first sale amount for the customes and average that.  The intent is to use find an average each year.   I am looking to use this against the adventure works database.   
I am not sure exatcly how to start this .  Any help is much appreciated.
J

Answer 1

Hi,
I'll do it in several stages.
let's first define an ordered set of date/sale to one customer over all periods:
SELECT
{[Measures].[Internet Sales Amount]} ON 0
NonEmpty
[Date].[Calendar].[Date]
[Customer].[Customer].&[15561]
,[Measures].[Internet Sales Amount]
,[Customer].[Customter].&[15561]
) ON 1
FROM [Adventure Works];
we retain the first line of the result set  with item(0):
SELECT
{[Measures].[Internet Sales Amount]} ON 0
NonEmpty
[Date].[Calendar].[Date]
[Customer].[Customer].&[15561]
,[Measures].[Internet Sales Amount]
,[Customer].[Customer].&[15561]
).Item(0) ON 1
FROM [Adventure Works];
next, for each year we define a measure that will retain the first sale for each customer
(I  limit the customer set to the first 2000)
WITH
MEMBER [Measures].[Mymeasure 2006] AS
NonEmpty
Exists
[Date].[Calendar].[Date].MEMBERS
,[Date].[Calendar].[Calendar Year].&[2006]
[Customer].[Customer].CurrentMember
,[Measures].[Internet Sales Amount]
,[Customer].[Customer].CurrentMember
).Item(0)
,[Measures].[Internet Sales Amount]
MEMBER [Measures].[Mymeasure 2007] AS
NonEmpty
Exists
[Date].[Calendar].[Date].MEMBERS
,[Date].[Calendar].[Calendar Year].&[2007]
[Customer].[Customer].CurrentMember
,[Measures].[Internet Sales Amount]
,[Customer].[Customer].CurrentMember
).Item(0)
,[Measures].[Internet Sales Amount]
SELECT
[Measures].[Mymeasure 2006]
,[Measures].[Mymeasure 2007]
} ON 0
,NON EMPTY
Head
[Customer].[Customer].[Customer]
,2000
) ON 1
FROM [Adventure Works];
We then take the average for each year:
WITH
MEMBER [Measures].[AVG cust first sale 2006] AS
Avg
Head
[Customer].[Customer].[Customer]
,2000
NonEmpty
Exists
[Date].[Calendar].[Date].MEMBERS
,[Date].[Calendar].[Calendar Year].&[2006]
[Customer].[Customer].CurrentMember
,[Measures].[Internet Sales Amount]
,[Customer].[Customer].CurrentMember
).Item(0)
,[Measures].[Internet Sales Amount]
MEMBER [Measures].[AVG cust first sale 2007] AS
Avg
Head
[Customer].[Customer].[Customer]
,2000
NonEmpty
Exists
[Date].[Calendar].[Date].MEMBERS
,[Date].[Calendar].[Calendar Year].&[2007]
[Customer].[Customer].CurrentMember
,[Measures].[Internet Sales Amount]
,[Customer].[Customer].CurrentMember
).Item(0)
,[Measures].[Internet Sales Amount]
SELECT
[Measures].[AVG cust first sale 2006]
,[Measures].[AVG cust first sale 2007]
} ON 0
FROM [Adventure Works];
Philip,