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Composite keys in fact tables

Is it a good approach to use a composite key in a fact table linking to a dimensional table?

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The fact that a fact table contains a composite key (a primary key that is made up of multiple parts) that links to a dimension table is exactly the approach that is used within dimensional modeling. All fact tables are made up of a composite key to a dimension table, thereby defining the grain of the table, and this then links to the key within the dimension table.

This was first published in September 2005

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