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Problem when combine data from folder

Hello everyone, I want to combine data from folder, each workbook in folder have worksheets same structure. But when I'm combine and transform, there's one field display "null" except  the data in file, which I was choose sample file, other fields are Ok. I don't know how to solve this problem. Please help me.

Sorry for my grammar, i'm not good at English. Thanks!

Community Support
Community Support

Hi @DucPM ,


If nothing has changed in formatting, you probably have nulls in your data source, you may investigating there. You can view previous steps in Applied Steps to check which one caused a null value.

Or there's a similar post for your reference:

Solved: Power Query combining NULL values - Power Platform Community (


Best Regards,

Stephen Tao


If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.           

Super User
Super User

Please provide sample data that covers your issue or question completely, in a usable format (not as a screenshot).
Please show the expected outcome based on the sample data you provided.

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