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DB DE Professional Flashcards

Active recall study cards for the Databricks Certified Data Engineer Professional exam. Flip each card to reveal the answer, filter by domain, or shuffle for spaced repetition.

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data-modeling

What is SCD Type 1 and when should you use it?

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Answer

SCD Type 1 overwrites existing dimension values with new ones using a simple MERGE (WHEN MATCHED THEN UPDATE SET *). No history is preserved. Use it when only the current state matters, such as preference settings or correctable data entry errors.

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