Filter to keep latest date for unique ID values in another column

Hello Anonymous 

use Table.Group with a special function like this

{{"AllRows", (group)=> Table.SelectRows(group, each [LoadDate]= List.Max(group[LoadDate]))}}

here the complete code

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjQ3VtJRMjLXM7DQMzJQitUhUcgMv5CRqQFQyMBIz8CSoJCRiZ6BOUEhvBpjAQ==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [JOBID = _t, LoadDate = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"JOBID", Int64.Type}, {"LoadDate",type date,"de-DE"}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"JOBID"}, {{"AllRows", (group)=> Table.SelectRows(group, each [LoadDate]= List.Max(group[LoadDate]))}}),
    #"Expanded AllRows" = Table.ExpandTableColumn(#"Grouped Rows", "AllRows", {"LoadDate"}, {"LoadDate"})
in
    #"Expanded AllRows"

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

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Have fun

Jimmy

Hi, Anonymous 

Based on your description, I created data to reproduce your scenario. The pbix file is attached in the end.

Table:

You may create add a new step with following m codes.

Custom1= Table.SelectRows(#"Changed Type",each 
let jobid=[JobID],loaddate=[LoadDate],
tab = Table.SelectRows(#"Changed Type",each [JobID]=jobid),
maxdate = List.Max(tab[LoadDate])
in 
loaddate=maxdate
)

Here are the codes in 'Advanced Editor'.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("lZFLDsMgDAXvwjoKtsF8zhLl/tcoIS2lxgR1AxJi9J49x2EQM6QAZjMY3XUCYiw3IMH1mixFS0D1hzm3kciYcALQziqCFHOqTB4Y2KMOucB3MT8W05t9Z0EcY2jSrUFMbyg8L6CLCf8SDgYCVsisFnHgVNfOoJjMlpoXFRAiu//u41FGCI99RNuvYITGDvGzFKGxQ1CfRDos1n1D/CokSIRggdwWfxC3QoZiVIqdLw==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ClientID = _t, JobID = _t, StaffID = _t, ServiceCode = _t, LoadDate = _t, ActualHoursAtETC = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ClientID", Int64.Type}, {"JobID", Int64.Type}, {"StaffID", Int64.Type}, {"ServiceCode", Int64.Type}, {"LoadDate", type date}, {"ActualHoursAtETC", type number}}),
    Custom1 = Table.SelectRows(#"Changed Type",each 
let jobid=[JobID],loaddate=[LoadDate],
tab = Table.SelectRows(#"Changed Type",each [JobID]=jobid),
maxdate = List.Max(tab[LoadDate])
in 
loaddate=maxdate
)
in
    Custom1

Result:

Best Regards

Allan

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