Q: We have a raging debate going here about whether to load null values into the data warehouse or not. One side argues that nulls give misleading query results and that we should translate nulls to some kind of 'dummy' value. The other side insists that loading artificial data violates the integrity of the DW and also carries a cost in terms of storage coonsumption, performance, and data management. What's the best practice approach to loading nulls into the DW?

It is been my experience that loading nulls into a data warehouse is generally not a good idea. You don't say whether the issue of nulls pertains to fact tables, dimension tables or both. I am going to assume that you are referring to fact tables.

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