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# Linking date dimension to date range in analysis services 2005

Posted on 2008-10-03
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I have a table describing accounts of a company.  It looks like this:
ID      Account_id      Active            Record_start_date      Record_end_date
1      1            false            01/01/2007            10/01/2007
2      1            true            11/01/2007            31/12/2007
3      1            false            01/01/2008            null
4      2            false            01/01/2007            31/01/2007
5      2            true            01/02/2007            31/09/2007
6      2            false            01/10/2007            null

Is it possible to connect this to a date dimension, so that i can get number of accounts, and number of active accounts
for a given date/date-period ?

I have been solving this by making a fact table containing one record per account per day, stating weather or not it was active or not,
and then doing a making a distinctcount measure on account_id, but this takes a lot of time to make, and also a lot of time to process,
so i thought that perhaps a more clever solution existed.   I have searched the web for a few days now, without finding the solution to this,
so i thought i would try you guys.

/ David Bojsen
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Question by:DavidBojsen
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Accepted Solution

srnar earned 500 total points
ID: 22641815
We are solving this with a special fact table e.g. F_AccountValidity where you have each account and a range. There is important to say that the fact table can be huge (often needs partitions) - if you have 1 mio of account and granularity of a range is a month so you have 12 mio of record per year (in case of daily granularity you will get 365 mio of records). Like a measure use only value 1 for sum or record count.

When using in MDX your account is active only when the sum or count is grater then 0 for specified set of days/months.
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Author Closing Comment

ID: 31502684
Hello srnar

Thanks for your comment.  Actually this is what i am already doing, as i tried to explain in the question.
I was just hoping that someone had a better solution.

Best Regards
David
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