Ginger Grant has started a new series on best practices for Analysis Services Tabular models:
Data Type Selection
The data type selected will impact the physical storage used, not the compression of the models in memory. It is important whenever possible to reduce the cardinality of the data in order to be able to sort the data effectively. When storing decimal numbers, unless you need many significant digits, store the data as Currency as it will take less space in physical storage than decimal.
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