Multiple fact tables or Calculated Measure

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Multiple fact tables or Calculated Measure

Post  saravanan.r on Wed Apr 27, 2011 1:26 pm

Gurus,
This is my first question here...
We have loan application data with various statuses....

For example,Application with AppNo 1and stauts "logeed in" etc...(in logged-in data sheet))
similarly application with appno 1 and status "processig"...(in processing data sheet

we have until 5 status...

to the question..
Can we load all data in to single fact and create a calc measure or we need to create spearate table for all status....?

We need report like
How may application got logged in/processed/pending etc certain time period?

We are using SSIS/AS ...

Thanks in Advance

saravanan.r

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Re: Multiple fact tables or Calculated Measure

Post  ngalemmo on Wed Apr 27, 2011 4:41 pm

There is no reason to create separate tables for each status.
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Re: Multiple fact tables or Calculated Measure

Post  datamodeller on Wed May 04, 2011 9:47 am

Not required to create multiple fact tables. Either it can be a single fact table with one of the grain dimensions as 'Status' or store the computed measures based on the status against the loan application if there is defined set of measures against the status. The former would be preferable.

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Re: Multiple fact tables or Calculated Measure

Post  hang on Sat May 07, 2011 8:18 am

You probably should use accumulating snapshot fact table based on Kimballís methodology. In your case, you will have 5 date key fields as FKs of a single role playing date dimension to store all the application milestones. You then need to include any necessary time lag measures in your fact table and let ETL set the values when the relevant milestone has been reached. In this style of fact table, you would periodically revisit previous records and change date keys from nonexistence to a significant date accordingly.

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