Posts Tagged ‘Type2’

Transforming Source Keys to Real Keys – Part 2: Using Maps To Fix Key Problems

August 15, 2011 11 comments

KeysIn 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 you can use the maps to correct for source key errors.

Using the taxonomy of key pathologies described earlier, I will walk you through some examples of map usage.

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