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Power Query Merge causing missing values (~7k difference in totals)
Our take
When merging large tables in Power Query, it's not uncommon to encounter discrepancies, such as a sum that is approximately 7,000 less than expected. This issue often arises from missing values during the merge process, which can be influenced by the type of join used, such as Inner vs. Left joins. To effectively troubleshoot this, you'll want to identify the specific rows that are missing.
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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