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Power Query - How to add multiple columns from parent to Nested Tables?|Power Query|Excel Forum|My Online Training Hub

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Power Query - How to add multiple columns from parent to Nested Tables?
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Richard K
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May 31, 2022 - 8:44 am
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I've recently figured out how to pass a single column from a parent table to nested tables by creating a custom column and using the following formula:

Table.AddColumn([FX_HR_SV_File_Initial_Transform], "Course_Name", (r)=> [Course_Name])

However, I need to pass a further 5 columns from the parent table into each nested table. Is there a way of doing this in one step? without having to add another 5 steps that each reference the table created in the step before?

Many Thanks

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Philip Treacy
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June 3, 2022 - 12:08 pm
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Hi Richard,

I'm not sure if you are appending or merging data, it'll depend on the structure of our tables.  But you could try something like this

Table.Combine({[Custom], Table.SelectColumns( Source, {"Col1", "Col2", "Col3", "Col4", "Col5"}) })

If that doesn't solve it, please supply a file with some dummy data.

Regards

Phil

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Jan pedersen

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March 26, 2023 - 2:37 pm
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Hi Philip

Thanks for your suggestion 

I have the same question as Richard K as I have used the same solution for a long time .

My query (FileInfo) has four columns
Col1 name= File name
Col2 name= Date Modified
Col3 name = File path 
Col4 name = Custom (nested/ Grouped tables

I want to add multiples columns from the Outer table (FileInfo) to the nested Table (Custom) 

 
Your solution only combines the Nested table(FileInfo) with Selected columns from the previous step,
It should  

Source = Folder.Files("<YOUR FOLDER>"),
BinaryBuffer = Table.TransformColumns(Source,{{"Content", Binary.Buffer}})
TransFormBinary = Table.TransformColumns(BinaryBuffer,{{"Content", each Excel.Workbook(_,true)}}),
Rename = Table.RenameColumns(TransFormBinary,{{"Name", "File name"}})
AddColToNestedtbl = Table.TransformColumns(Rename", {"Content", (i)=> Table.AddColumn(i, "FileInfoTable", (R)=> Table.Combine({ i, Table.SelectColumns(Rename, {"File name", "Date modified"}) }))})

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Philip Treacy
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March 26, 2023 - 8:29 pm
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Hi Jan,

I'm not sure if you are asking me something?

regards

Phil

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