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Transforming Source Keys to Real Keys – Part 1: Introducing Map tables
I have ranted enough about the key quality, or lack thereof, in source systems. It is time to look at how we will practically go about transforming the dirty source to the final DW model. What I shall...
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Transforming Source Keys to Real Keys – Part 2: Using Maps To Fix Key Problems
In part 1 of this post, I introduced the idea of map tables. These tables serve as an abstraction between the source systems and the entities in the data warehouse. In this post, I will describe how...
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Physically Placing the Maps in the architecture
Before we leave the maps behind, I need to live up to my promise of describing the storage characteristics of tables visited during the journey through the warehouse architecture. This must include the...
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