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JamesMcEwan's avatar
JamesMcEwan
Helper I
4 years ago
Solved

Expanding ListColumns within Nested Tables

Hi all,  I am looking to expand a ListColumn within a nested table, however I would like to so this without adding a new column. Is there a way to expand the list without adding a new column to the ...
Need Help
  • artpil's avatar
    artpil
    4 years ago

    Hi,

     

    So you probably want something like this:

     

    let
    Source =  
        Table.FromRecords(
            {
                [Name = "Bob",  Color = "Blue"],
                [Name = "Jim",  Color = "Yellow"],
                [Name = "Paul", Color = "Green"]
            }
        ),
#"AddTab;e"=
    Table.AddColumn (Source, "TypeID", each 
        Table.FromRecords(
            {
                [Type= "Small",     ID = {1,2,3}],
                [Type = "Medium",   ID = {2,4,6}],
                [Type = "Large",    ID = {1,3,6}]
            }
        )
    ),
    TransformColumn = Table.TransformColumns(#"AddTab;e",{"TypeID", each Table.ExpandListColumn(_, "ID")})
in
    TransformColumn

     

     

    Hope it helps,

    Artur

artpil's avatar
artpil
Resolver II
4 years ago

Hi,

 

So you probably want something like this:

 

let
    Source =  
        Table.FromRecords(
            {
                [Name = "Bob",  Color = "Blue"],
                [Name = "Jim",  Color = "Yellow"],
                [Name = "Paul", Color = "Green"]
            }
        ),
#"AddTab;e"=
    Table.AddColumn (Source, "TypeID", each 
        Table.FromRecords(
            {
                [Type= "Small",     ID = {1,2,3}],
                [Type = "Medium",   ID = {2,4,6}],
                [Type = "Large",    ID = {1,3,6}]
            }
        )
    ),
    TransformColumn = Table.TransformColumns(#"AddTab;e",{"TypeID", each Table.ExpandListColumn(_, "ID")})
in
    TransformColumn

 

 

Hope it helps,

Artur

  • JamesMcEwan's avatar
    JamesMcEwan
    Helper I
    4 years ago

     

    Hi artpil,

     

    This is great and worked a treat. I also had just figured out my own solution - so will copy below, in case there is a use case for either. 

     

    Thanks!

     

     

    let
    Source =  
        Table.FromRecords(
            {
                [Name = "Bob",  Color = "Blue"],
                [Name = "Jim",  Color = "Yellow"],
                [Name = "Paul", Color = "Green"]
            }
        )
in 
    Table.AddColumn (Source, "TypeID", 
        each 
            let 
                _usertable = 
                    Table.FromRecords(
                        {
                            [Type= "Small",     ID = {1,2,3}],
                            [Type = "Medium",   ID = {2,4,6}],
                            [Type = "Large",    ID = {1,3,6}]
                        }
                    )   
            in 
                Table.ExpandListColumn(
                    _usertable,"ID"
                )
    )