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You can have a Start schema in3NF, and there is no such thing as this is the best way to design a data warehouse, it all go back to the use of the DW:
- Who is going to use the DW?
- What tool is used to visualize the data: for e.g. DW -> MS OLAP -> DATA MARTS -> Client Application.
- What is the size of the data?
- What is the update frequency for the DW?
And the list goes on, so you need to be more specific to get the right answer.
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