Degenerated Dimension

Lesson Notes

Degenerate Dimension Lesson Notes

Video

Degenerate Dimensions

  • Degenerate Dimensions

    • Dimension Key without corresponding dimension table.

    • Stored in fact table.

    • It used to provide a grouping for business cases.

Degenerate Dimensions Example

Degenerate Dimensions Example

OrderID OrderDate ProductID Quantity Amount
123 123456789 111 2 120.45
123 123456789 222 5 10.45
431 98765122 333 1 15.45
431 98765122 555 6 4.45

Further Reading

Dimensional Modeling: In a Business Intelligence Environment. The book is free, and you can download it from this link. You can read the below parts for more information about degenerate dimension.

  • Chapter 5: Dimensional Model Design Life Cycle Section 5.4.2
  • Chapter 6.3.1 Degenerate dimensions page 240
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