cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
dkay84_PowerBI
Microsoft
Microsoft

Power Query Challenge for you M Ninjas

I would like a query or function that will append every column in a table into a single list with dups removed.  The names and number of columns is random so the solution needs to be dynamic.

1 ACCEPTED SOLUTION
MarcelBeug
Community Champion
Community Champion

How about:

List.Distinct(List.Union(Table.ToColumns(Tabel1)))

(This is the entire query code) 

Specializing in Power Query Formula Language (M)

View solution in original post

5 REPLIES 5
MarcelBeug
Community Champion
Community Champion

How about:

List.Distinct(List.Union(Table.ToColumns(Tabel1)))

(This is the entire query code) 

Specializing in Power Query Formula Language (M)

View solution in original post

Hi Marcel,

 

Could you also do?:

List.Distinct(Table.Schema(Table1)[Name])

 

Question about List.Union:

I understand that "The returned list contains all items in any input lists" and the Union is operating on the output of Table.ToColumns which returns a nested list of "columns of values". However since our values are all coming from the same table can't we just grab the table columns directly as in my first question above?

 

Closeing statement:

Almost every time I visit this site your solution is typically chosen as the answer. I understand what it would take to accomplish this and its impressive. Really great work. Thanks for all your posts clarifying the use of the M language on this forum.

 

 

This is pretty awesome.  Is it possible to transpose the list so that column headers remain and we still get distinct values for each column?  Kind of like a transposed version of:          List.Distinct(Table.ToColumns(Tabel1))              except only unique values.

 

Thank you sir,

Alec

 

This is pretty awesome.  Is it possible to transpose the list so that the column headers remain and we still get distinct values for each column?

Anonymous
Not applicable

Will a single-column table result do? - e.g.:

let
    Source = Table1,
    #"Added Index" = Table.AddIndexColumn(Source, "Index", 1, 1),
    #"Unpivoted Other Columns" = Table.UnpivotOtherColumns(#"Added Index", {"Index"}, "Attribute", "Value"),
    #"Removed Other Columns" = Table.SelectColumns(#"Unpivoted Other Columns",{"Value"}),
    #"Removed Duplicates" = Table.Distinct(#"Removed Other Columns")
in
    #"Removed Duplicates"

Helpful resources

Announcements
UG GA Amplification 768x460.png

Launching new user group features

Learn how to create your own user groups today!

November Power BI Update 768x460.png

Check it Out!

Click here to read more about the November 2021 Updates!

M365 768x460.jpg

Microsoft 365 Collaboration Conference | December 7–9, 2021

Join us, in-person, December 7–9 in Las Vegas, for the largest gathering of the Microsoft community in the world.