Question

How to sum over time period in MDX

Asked by: kubaf

I got time dimension based on DateTime column in fact table. Now i'am trying to build MDX query to sum fact rows on custom time periods. For example:

SELECT [Events Count] ON Columns, [20 seconds time periods] on Rows FROM [Common]

Result i expect:

                                             Events Count
2008-10-29 17:22:00                     1
2008-10-29 17:22:20                     2
2008-10-29 17:22:40                     1
2008-10-29 17:23:00                     56

How to build MDX query?
regards
Kuba F.

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Asked On
2008-10-29 at 09:26:04ID23858600
Tags

MS-SQL Analysis Services MDX

Topics

OLAP

,

MS SQL Server

Participating Experts
1
Points
500
Comments
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Answers

 

by: srnarPosted on 2008-10-30 at 01:06:05ID: 22838829

Use a new dimension with 60 members - one for each second. Map this dimension to your fact table. Then you can construct 3 custom sets e.g. {Second.[0]:Second.[19]}, {Second.[20]:Second.[39]}, {Second.[40]:Second.[59]} and put them on the row axes.

 

by: kubafPosted on 2008-10-30 at 01:15:00ID: 22838856

srnar can you write sample MDX with sets? I'am kinda new in analysis services.

 

by: srnarPosted on 2008-10-30 at 01:32:32ID: 22838925

Here is example on Adventure works that creates virtal members based on sets and puts them on the rows.

with set Decade01Set
as
	{[Date].[Fiscal].[Date].[July 1, 2001]:[Date].[Fiscal].[Date].[July 10, 2001]}
set Decade02Set
as
	{[Date].[Fiscal].[Date].[July 11, 2001]:[Date].[Fiscal].[Date].[July 20, 2001]}	
member [Date].Fiscal.Decade01
as
	aggregate(Decade01Set)
member [Date].Fiscal.Decade02
as
	aggregate(Decade02Set)
select Measures.Defaultmember on columns,
{[Date].Fiscal.Decade01, [Date].Fiscal.Decade02} on rows
from [Adventure Works];

                                              
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