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Why might merging columns in Power BI cause data quality issues if not done carefully?

hard📝 Conceptual Q10 of 15
Power BI - Power Query Editor
Why might merging columns in Power BI cause data quality issues if not done carefully?
ABecause merging splits columns instead of combining
BBecause merging always deletes original columns
CBecause merging changes data types automatically
DBecause merging can create ambiguous combined values if delimiters are missing
Step-by-Step Solution
Solution:

  1. Step 1: Understand merging risks

    Merging without delimiters can join values confusingly, causing ambiguity.

  2. Step 2: Check other options

    Merging does not delete columns automatically, does not change data types, and does not split columns.

  3. Final Answer:

    Because merging can create ambiguous combined values if delimiters are missing -> Option D

  4. Quick Check:

    Merging without delimiters risks data quality [OK]
Quick Trick: Always use delimiters when merging columns [OK]
Common Mistakes:
  • Thinking merging deletes columns
  • Assuming data types change
  • Confusing merging with splitting

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