•1 min read•from Microsoft Excel | Help & Support with your Formula, Macro, and VBA problems | A Reddit Community
Power Query Merge causing missing values (~7k difference in totals)
I’m merging two large tables in Power Query, but I’m running into a data accuracy issue.
After the merge, I noticed that the sum of a specific column is about 7,000 less than the total in the original table. So it looks like some data is missing during the merge.
I’m working with large datasets, and I want to properly debug this.
What are the most common reasons for missing values after a merge?
Could this be join (e.g., Inner vs Left)?
How can I identify exactly which rows are missing?
What’s the best way to troubleshoot this and make sure no data is lost in the merge?
Any help or tips would be appreciated 🙏
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