IBM Cognos Dynamic Cubes

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Advanced topics in modeling

This chapter describes how to solve common advanced modeling problems, identifies design considerations that a modeler needs to think about, shows how to troubleshoot models, and includes practice exercises.

This chapter contains the following sections:

•Model design considerations

•Time dimensions and relative time

•Slowly changing dimensions

•Role-playing dimensions

•Multiple fact and multiple fact grain scenarios

•Data quality and integrity

•Logical Modeling

•Modeling for null values

•Scenario dimensions

•Troubleshooting ...

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