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Compare the daily updated Excel sheets

Data source is Folder, the same format of Excel file is exported and replaced daily in the folder.

The visual only need the values in the latest file but if the value is modified since yesterday, the value want to be highlited in red.


Yesterday's Excel file



Today's Excel file



Table visual wants to show:



Feeling I need 1) set the datasource = the folder, 2) append the data, 3)Sort by the Excel import date and compare the rows by the Order# of the latest vs the second latest, set the flag which columns have different, 4) Cell font conditional format by the flag.

I need your help how to realize 3) step, or any better workaround?


Thank you so much!

Frequent Visitor

Thank you. Ok, need two tables. Now I am trying to find how to move the data from the updated table (today's data) -> to the original table (yesterday's data) automatically when daily refresh. Assume I need the move dataset command like below in red before transforming the latest Excel file. Or set the refresh order, "duplicate the table" should run before "refresh the updated table".


Source = Folder.Files("FOLDERPATH"),
ORIGINAL DATASET = UPDATED DATASET, (<- move the table/dataset, but unable to find how to write in M. )
#"then continue the transform on the Source (= today's data)...


Two tables and its data:

Operation DayORIGINAL TABLE (Yesterday's data)UPDATED TABLE (Today's data)
DAY 2DAY 1 dataDAY 2 data
DAY 3DAY 2 dataDAY 3 data
DAY 4DAY 3 dataDAY 4 data ... continue


This answer says this cannot be done by Power BI. Anyone comes up with any workaround?

Community Support
Community Support

Hi @lunako ,


To my knowledge, no, it's not possible in Power BI. Upon refresh it loads the most up-to-date data.


So you may need two tables : Original Table and Updated Table.  And then use functions like LOOKUPVALUE() to identify the modified data.

For more information, you may refer to: How to track changes in the table in Power Query - Exceed


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

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