Merging an unknown number of columns

Hello Anonymous ,

this would be a solution thats its really dynamic

let
	Source = #table
	(
		{"Comment","xy","zz","test"},
		{
			{"abc","f","500","5"},	{"a","c","200","3"},	{"o","d","",""}
		}
	),
    ChangeType = Table.TransformColumnTypes(Source,{{"zz", Int64.Type}}),
	ToRows= Table.ToRows
	(
		ChangeType
	),
	Transform = List.Transform
	(
		ToRows,
		(transform)=> Text.Combine(List.Select( List.Transform(transform, (transform1)=> Text.From(transform1)), each _ <> ""), ", ")
	),
	Combine = Table.FromColumns
	(
		Table.ToColumns(ChangeType)&{Transform},
		Table.ColumnNames(ChangeType)&{"Concatenating"}
	)
in
	Combine

Copy paste this code to the advanced editor to see how the solution works. If this solution fits your need, copy and past a part of it and implement it in your query, or I could create a custom function what makes it easier to apply if you are not used that much to power query.

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy