Want to create flag for max date

[sahgir123]

I have table like -  input table - want to create new custom column, if Date column contain max date then 1 else 0 using M-Code.

Content	Files	Date
Binary	Jan23	01/01/2023
Binary	Feb23	01/02/2023
Binary	Feb24	02/02/2024
Binary	Feb24	14/02/2024

i want output in new column contain

Files	O/p
Jan23	0
Feb23	0
Feb24	1

  Feb 24   1

[m_dekorte · Accepted solution]

Hi @sahgir123 

See if this works for you

let
    maxDate = List.Max( List.Distinct( ChType[Date])),
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcsrMSyyqVNJR8krMMzIG0gaG+kBkZADkxOogybulJsHljXDIm4DkjaDyJtjlDU0Q8rEA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Content = _t, Files = _t, Date = _t]),
    ChType = Table.TransformColumnTypes( Source, {{"Date", type date}}, "nl-NL"),
    AddIsMax = Table.AddColumn(ChType, "IsMax", each if [Date] = maxDate then 1 else 0)
in
    AddIsMax

This gets me the Dates column from the ChType step: ChType[Date]

It's used in the maxDate variable to retrieve the max value and is used to add the IsMax column

I hope this is helpful