Filter Max Value By Two Columns

[numersoz]

Hi,

I have a transactions query with product ID and transaction date.

I want to filter the transaction date, so that it shows the latest transaction date for each product.

For example:

Product 1 1/1/2020

Product 1 1/2/2020

Product 2 1/5/2020

Will be converted to:

Product 1 1/2/2020

Product 2 1/5/2020

Where for each product, it only shows the row that has the max date.

I would like to do this in Power Query if possible, not DAX. Help will be appriciated.

[Jimmy801 · Accepted solution]

Hello @numersoz 

select your transaction column, and launch the group function. Select there your new name of the date, function max and your date column

Here is the code

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WCijKTylNLlEwVNJRMjDUAyIjA6VYHUwJI3QJI4QOQ6wSxnpGRkqxsQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Transaction = _t, Date = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Transaction", type text}, {"Date", type date, "de-DE"}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Transaction"}, {{"Date", each List.Max([Date]), type date}})
in
    #"Grouped Rows"

Copy paste this code to the advanced editor in a new blank query to see how the solution works.
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

[numersoz]

@Jimmy801  thank you this worked!

[Anonymous]

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WCijKTylNLlEwVNJRMtQ31DcyMDJQitVBlzDClDACS5hCJWIB", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Product = _t, date = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Product", type text}, {"date", type date}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Product"}, {{"dates", each List.Max([date]), type nullable date}})
in
    #"Grouped Rows"

use above query