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Helper II
Helper II

Power Query / Complex Data Transformation / Multiple Headers

Hello BI Community,


I am working with a data source that is excel based and I am very limited in the changes I can make with the structure. See below photos as a reference, photo 1 shows the scrubbed date version of the original table I am working with and photo 2 shows examples of the transformation I am trying to achieve. In reality, the original table contains hundreds of columns and contains both numerical/alphanumerical values in the cells and so I just want to tackle one problem at a time.


This table contains multiple headers and so I am trying to clean up the table so that it can look like either option #1 or option #2. I have been able to replicate option #1 however then I am faced with needing to duplicate the query and repeat the steps for the hundreds of columns. Has anyone successfully trasnformed a sheet similiar to the one shown below and if so, is there a particular technique you used to perform this over many columns?


Another option I was thinking is to create a unique column / query that displaying the well names and then integrate into the M-code an iterating step down through this column. Does anyone have any example M-code of interating steps to repeat a series of transformations & merges? If so, can I have a copy of that code?


Thanks in advance!





Hi @Joerobert,


Could you please mark the proper answers as solutions?


Best Regards,


Community Support Team _ Dale
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

For Option1: First you have to unpivot on the first column, adressing the first 2 rows as headers and then pivot back just with the values from the 2nd row.


Therefore you have to use my special function here:


Use it like this:




    Source = fnUnpivotByNumbers(Table1, 1, 2),
    #"Pivoted Column" = Table.Pivot(Source, List.Distinct(Source[Attrib.2]), "Attrib.2", "Value")
    #"Pivoted Column"







Imke Feldmann (The BIccountant)

If you liked my solution, please give it a thumbs up. And if I did answer your question, please mark this post as a solution. Thanks!

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