Grouped fill down by Dates

Hi, Tand81 

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

Table:

You may go to 'Query Editor' and input the following codes in 'Advanced Editor'.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("dc7BCQAhDETRXnJW1ESdWIvYfxvu6i6I6C3M40NqJQFQ1MKTIXXi2PN7BmpmR/xoP9WYNVhNz5Qdx61dFNcWQxnndqr4S6zjrVDO8VROa9w6", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ORdPos = _t, Date = _t, Cont = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"ORdPos", type text}, {"Date", type date}, {"Cont", Int64.Type}}),
    Custom2 = Table.AddColumn(#"Changed Type","RE",each 
let x=[ORdPos],y=[Date]
in 
Duration.Days( Table.Max(Table.SelectRows(#"Changed Type",each [ORdPos]=x),"Date")[Date]-y)
),
    Custom3 = Table.AddColumn(Custom2,"list",each let x=[RE] in List.Generate(()=>1,each _<=x,each _+1)),
    #"Expanded list" = Table.ExpandListColumn(Custom3, "list"),
    Custom4 = Table.AddColumn(#"Expanded list","NewDate",each if
[list]<>null then [Date]+#duration([list]-1,0,0,0) else [Date]),
    #"Removed Columns" = Table.RemoveColumns(Custom4,{"Date", "RE", "list"})
in
    #"Removed Columns"

Result:

Best Regards

Allan

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