Custom Aggregation/Column Concatenation Within an MDX Query - ssas

Question

I have a date dimension and a time dimension and a measure called [Count - Sales]. I would like to run a query that would give me the count of sales over a range of time on a given date, and also concatenate the date and time values and show me the start and end date-time. So the end results I am expecting would look something like this:
StartDateTime | EndDateTime | Count - Sales
------------------------------------------------
20130901 12 | 20130901 16 | 4000
20130902 12 | 20130902 16 | 4123
I have come up with a way to concatenate the date and time values, but I haven't been able to figure out a way to have the two columns StartDateTime and EndDateTime. The query I have right now gives me the [Count - Sales] for every hour:
WITH MEMBER Measures.DateTime AS
[Date].[Date].CurrentMember.Name + " " + [Time].[Hour 24].CurrentMember.Name + ":00"
SELECT
{{[Date].[Date].&[20131101]:[Date].[Date].&[20131101]}*{[Time].[Hour 24].&[10]:[Time].[Hour 24].&[14]},
{[Date].[Date].&[20131102]:[Date].[Date].&[20131102]}*{[Time].[Hour 24].&[10]:[Time].[Hour 24].&[14]} } ON ROWS,
{Measures.DateTime,
[Measures].[Count - Sales] } ON COLUMNS
FROM Sales
And the result is:
Date Time DateTime Count - Sales
20131101 10 20131101 10 206
20131101 11 20131101 11 251
20131101 12 20131101 12 318
20131101 13 20131101 13 304
20131101 14 20131101 14 300
20131102 10 20131102 10 194
20131102 11 20131102 11 251
20131102 12 20131102 12 298
20131102 13 20131102 13 329
20131102 14 20131102 14 345
Any help/guidance would be appreciated.

Answer 1

WITH SET [Time Range Set] AS
[Time].[Hour 24].&[10] : [Time].[Hour 24].&[14]
MEMBER [Time].[Hour 24].TimeRange AS
Aggregate([Time Range Set])
MEMBER Measures.StartDateTime AS
[Date].[Date].CurrentMember.Name + " "
+ [Time Range Set].Item(0).Item(0).Name + ":00"
MEMBER Measures.EndDateTime AS
[Date].[Date].CurrentMember.Name + " "
+ Tail([Time Range Set]).Item(0).Item(0).Name + ":59"
SELECT
{ Measures.StartDateTime, Measures.EndDateTime, [Measures].[Count - Sales] }
ON COLUMNS,
{[Date].[Date].&[20131101]:[Date].[Date].&[20131102]}
*
{[Time].[Hour 24].TimeRange}
ON ROWS
FROM Sales
On the rows, you only want to show two days, and the time range member for each one. The .Item(0).Item(0) construct gets the first member of the first tuple of a set. Hence, we can use it directly for the StartDateTime, but need to apply Tail, which returns a set containing the last tuple of the set to which it is applied.
Please note that specifying ROWS before COLUMNS violates the MDX specification (but Analysis Services is tolerant and interprets it correctly).