You tried to pivot a column in Power Query but got an error saying "Aggregation function required". What is the most likely cause?

medium📝 Formula Fix Q14 of 15

Power BI - Data Cleaning with Power Query

AYou selected multiple value columns instead of one

BYou applied pivot on an empty table

CYou did not select an aggregation function for pivoting

DYou tried to pivot a numeric column instead of text

Step-by-Step Solution

Solution:

Step 1: Understand pivot error message
The error "Aggregation function required" means Power Query needs to know how to combine multiple values when pivoting.
Step 2: Identify missing step
You must choose an aggregation like Sum or Count when pivoting if multiple rows map to the same pivoted column.
Final Answer:
You did not select an aggregation function for pivoting -> Option C
Quick Check:
Missing aggregation causes pivot error [OK]

Quick Trick: Always pick aggregation when pivoting multiple values [OK]

Common Mistakes:

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