BrainTrust Investment Lab › Band 3 — Loading (Delivering to the Kimball STAR)
BrainTrust Investment Lab

SS15 — Multivalued Dimension Bridge Table Builder

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Band 3 — Loading (Delivering to the Kimball STAR) · book 477-478 · grain: one station per walk sheet

When a fact honestly belongs to many parties — one filing, three registrants — we build the bridge table the book prescribes, weights and all, rather than double-counting or quietly picking a winner.

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The contract — what each step must produce

#steppagewhat the book requires
2the grain cannot absorb itp.477'If the grain of the fact table cannot be changed to directly support this dimension, then the multivalued dimension must be linked to the fact table…
3unique or reused -- and the book says it is hardp.477'the ETL system has the choice of either making each set of observations a unique group or reusing groups when an identical set of observations…
4declared, or honestly absentp.478'in other cases, the identification of the appropriate weighting factor can be problematic because there may be no rational basis for assigning the…
5if the members are type 2, the bridge is datedp.477-478'In the event the multivalued dimension has type 2 attributes, the bridge table must also be time varying, such as a patient’s time variant set of…