What is the difference between top down and bottom up enterprise data warehouse design?
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meda Selected answer as best 20/10/2022
In data warehouse development process we follow either top down or bottom-up development methodology.
In bottom-up approach data marts (a departmental data warehouse that stores only relevant data) are first created and integrated (bus architecture) to an enterprise data warehouse .
And in top down approach the data warehouse is built first and data marts are then created from the data warehouse.
Both approaches have their own pros and cons.
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meda Selected answer as best 20/10/2022