The primary key of fact table can simply be all its dimension keys (including degenerated dimensions) which are all columns except measures. Sometimes, it doesn't necessary to be all dimension keys since there may be some redundant information in dimensions. We usually don't need to generate a surrogate key for the fact table but simply use the composite primary key from those dimension keys columns. This primary key is also aligned to the granularity of the fact table.
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We usually implement the multi-dimensional data model in RDBMS or CUBE. Today, we focus on the Constraints and indexes in multi-dimensional ...
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Measures are the values in your fact tables which provide numeric meaning to the business process event. There are three kinds of numeric me...
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We always recommend to flatten the (fixed-depth) hierarchy information into the dimension. It is how we keep the star schema simple and nice...
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