Simulate ROW Number as SQL Server to have latest date and corresponding value to that date

[Ricardofaster]

Hi, I need to have the the latest date and the corresponding Fee of a Customer table having many different customers and many rows for the same Customer. This can be done easily in SQL Server with ROW_NUMBER and then ordering It by the Latest Date. 

Input:

Customer	Date	Fee
A	13/01/2020	10
A	25/01/2020	15
B	26/01/2020	12
B	16/01/2020	7
B	17/01/2020	13
C	05/01/2020	20
C	02/01/2020	25
C	20/02/2020	15

Temporal

Customer	Date	Fee	Row Number
A	13/01/2020	10	2
A	25/01/2020	15	1
B	26/01/2020	12	1
B	16/01/2020	7	3
B	17/01/2020	13	2
C	05/01/2020	20	2
C	02/01/2020	25	3
C	20/02/2020	15	1

Output:

Customer	Date	Fee
A	25/01/2020	15
B	26/01/2020	12
C	20/02/2020	15

Thanks in advance

[Icey · Accepted solution]

Hi @Ricardofaster ,

The code @CNENFRNL provided works well. 

If you don't want to change the code manually, just try this:

Best Regards,

Icey

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

[Anonymous]

You don't need Row Number to do this... First, just use GROUP BY to get the latest dates for each customer and then JOIN the output to the original table on customer and the date. It'll pick up the rows you want.

[CNENFRNL]

Hi, @Ricardofaster , it's as easy as in SQL to process in PQ given there's in PQ an equivalent of Grougp By clause in SQL.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("Tc7BDcAgDAPAXfJGwjFKebcdA7H/GgUqgX/xJbLSmt2WzEuGZ4KYAdbT7wz1WP5Mv9S53dXr4arnZfk7Rmg9cZzqsZ3IYyXv9A8=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Customer = _t, Date = _t, Fee = _t]),
    #"Changed Type" = Table.TransformColumns(Source,{{"Date", each Date.FromText(_, "fr")}, {"Fee", Number.From}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Customer"}, {{"temporal", each Table.Sort(_, {"Date", Order.Descending}){0}}}),
    #"Expanded temporal" = Table.ExpandRecordColumn(#"Grouped Rows", "temporal", {"Date", "Fee"}, {"Latest Date", "Fee"})
in
    #"Expanded temporal"

[Ricardofaster]

Hi,

@CNENFRNL , @Icey Thank you very much, both solutions work.

I appreciate your help.

All the best.

[Ricardofaster]

Hi @CNENFRNL , 

Thanks for your response but with your solution I will only get the sum of the Fees by Employee. What I need is the unic value of the Fee corresponding with the latest date  by Customer.

[CNENFRNL]

Hi, @Ricardofaster , I've amended the code in line with your requirement. Pls try it again.