Overlay Two Tabel

[JarekM]

Hi, I am New

maybe someone can help me here

I need to overlaay two tabel 

I tried to group but got stuck, how to do this using : 

 #"Aantal samengevoegd" = Table.AggregateTableColumn(#"Rijen gegroepeerd", "Aantal", {{"1-1-2023", List.Buffer, "1-1-2023"}}),
#"Uitgepakte waarden" = Table.TransformColumns(#"Aantal samengevoegd", {"1-1-2023", each Text.Combine(List.Transform(_, Text.From), " "), type text})  with replacing dates for "each _"??

Thank You for Help! 

[jennratten]

Hello - below is how you can add a new column that checks whether or not the value is a date.  If you can post a sample of your data and show what your expected result is I can help further.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMtQ31DcyMDJWitWJVkrKKU0FM4BiCNH0otTUPKXYWAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each try Value.Is ( Date.From ( [Column1] ), type date ) otherwise false)
in
    #"Added Custom"

[JarekM]

I do not want to do this same step 365 times, it is not going about to chacke if is date or not, I want to use List with colums.... something like this....

#"Aantal samengevoegd" = Table.AggregateTableColumn(#"Rijen gegroepeerd", "Aantal", {{"1-1-2023", List.Buffer, "Totaal van 1-1-2023"}, {"2-1-2023", List.Buffer, "Totaal van 2-1-2023"}}),

I need something like Table.AggregateTableColumn(#"Rijen gegroepeerd", "Aantal", each _ Column in ColumnList, List.Buffer, Column Name)

#"Uitgepakte waarden" = Table.TransformColumns(#"Aantal samengevoegd", {"Totaal van 1-1-2023", each Text.Combine(List.Transform(_, Text.From), " "), type text}),
#"Uitgepakte waarden1" = Table.TransformColumns(#"Uitgepakte waarden", {"Totaal van 2-1-2023", each Text.Combine(List.Transform(_, Text.From), " "), type text})

This one i need to do one time and not 365 times....

#"Uitgepakte waarden1" = Table.TransformColumns(#"Uitgepakte waarden", {each column, each Text.Combine(List.Transform(_, Text.From), " "), type text})

I'm not sure I do it good

[jennratten · Accepted solution]

Hello - instead of looping through columns, I think it would be better to append the tables, unpivot, transform and repivot, like this:

let
    Source = Table.Combine({Table1, Table2}),
    #"Unpivoted Other Columns" = Table.UnpivotOtherColumns(Source, {"Name", "Place"}, "Attribute", "Value"),
    #"Replaced Value" = Table.ReplaceValue(#"Unpivoted Other Columns","",null,Replacer.ReplaceValue,{"Value"}),
    #"Grouped Rows" = Table.Group(#"Replaced Value", {"Name", "Place", "Attribute"}, {{"Data", each _, type table [Name=nullable text, Place=nullable text, Attribute=text, Value=text]}}),
    #"Added Custom" = Table.AddColumn(#"Grouped Rows", "Custom", each if List.NonNullCount ( [Data][Value] ) > 1 then Text.Combine ( List.Sort ( [Data] [Value] ), " - " ) else List.RemoveNulls ( [Data][Value] ){0} ),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"Data"}),
    #"Pivoted Column" = Table.Pivot(#"Removed Columns", List.Distinct(#"Removed Columns"[Attribute]), "Attribute", "Custom")
in
    #"Pivoted Column"

Result

[JarekM]

thank you for your help, it works perfectly😁