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Which column type typically consumes the most memory in a Power BI model?

  1. A High-cardinality columns such as GUIDs or timestamps to the second
  2. B Boolean columns
  3. C Short text columns with few distinct values
  4. D Integer keys with low cardinality
Answer

High-cardinality columns such as GUIDs or timestamps to the second

VertiPaq compresses by distinct value, so splitting a datetime into separate date and time columns often shrinks a model dramatically.

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