Joining fact tables

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Joining fact tables

Post  dellsters on Fri Feb 25, 2011 11:33 am

I have a order fact table. I have a call fact table. For each order, there is a call associated with it. Would I have the call id on the order fact and to join the 2 facts?

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Re: Joining fact tables

Post  ngalemmo on Fri Mar 04, 2011 1:09 pm

Or the order id on the call. Whichever works for you.
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Re: Joining fact tables

Post  Jeff Smith on Fri Mar 04, 2011 1:45 pm

Just curious, but why do you need to join the 2 fact tables? If you need to join them on more that a very infrequent basis, why would you simply put which ever dimensions you need on 1 fact table on the other fact table?

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Re: Joining fact tables

Post  ngalemmo on Fri Mar 04, 2011 5:36 pm

I'm assming dellsters is referring to degenerate dimensions. In a sales order model is it very rare you would have or need an Order dimension... same thing with call logs.
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Re: Joining fact tables

Post  rmorrison100 on Mon Mar 07, 2011 3:15 am

Thanks for the information.

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