A function on a list

[Netrelemo]

I need a function to find the highest value in one column of a 3 column list. How do I do this? 

let
    Source = (#"My3ColList"  as any) => let

    LatestDate = List.Max([Source].[Period]), type date}})
in
Source
in Source

let
    Source = (Table as table) => Table.Column(Table, "Period" as text) as list,
    pSource = (list as any) => List.Max(list),
    x = pSource(Actuals)
in
    x

[v-kkf-msft · Accepted solution]

Hi @Netrelemo ,

Try the following function:

let
    Source = (EnterTable  as any, EnterColumn as any)  => List.Max(Table.Column(EnterTable, EnterColumn as text))
     
in
    Source

Then invoking function MaxValue:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjIwMtQFQiUdJUMDAyDpqBSrAxU2BQubgkSdEaJmUMVAwkkpNhYA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Period = _t, Value = _t, Column2 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Period", type date}, {"Value", Int64.Type}, {"Column2", type text}}),
    #"Max Value" = MaxValue(#"Changed Type","Period")

in
    #"Max Value"

If the problem is still not resolved, please provide detailed error information or the expected result you expect. Let me know immediately, looking forward to your reply.

Best Regards,
Winniz

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[lbendlin]

Please provide sample data in usable format (not as a picture) and show the expected outcome.