The Data Warehouse Toolkit by Ralph Kimball & Margy Ross
Author:Ralph Kimball & Margy Ross [Kimball, Ralph & Ross, Margy]
Language: eng
Format: epub
ISBN: 9781118732281
Publisher: Wiley
Published: 2014-11-03T00:00:00+00:00
These dimensions can typically be added gracefully to a design, even after the DW/BI system has gone into production because they do not change the grain of the fact table. The addition of these dimensions usually does not alter the existing dimension keys or measured facts in the fact table. All existing applications should continue to run without change.
NOTE
Any descriptive attribute that is single-valued in the presence of the measurements in the fact table is a good candidate to be added to an existing dimension or to be its own dimension.
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