Missing Week Numbers

[JeevanMallya]

I have 3 Columns - First Column is YEAR in format YYYY of Type WholeNumber, Second column is WEEK_NUM in format WW of Type WHole Number Ranging from 0 to 53, Third Column is Result of some data. 

The Problem : Some weeks are missing for respective years highlighted in Red in the attached screenshot.

I want to identify those missing weeks and insert the running week number, Year and insert zero in the third column.

Could you please help me with the steps or Powerbi query.

[AlienSx · Accepted solution]

let
    Source = your_3_columns,
    fifty_three = List.Buffer({0..53}),
    f = (tbl) =>
        [a = tbl & Table.FromColumns({List.Difference(fifty_three, tbl[WEEK_NUM])}, {"WEEK_NUM"}),
        b = Table.Sort(a, "WEEK_NUM"),
        c = Table.TransformColumns(b, {"CREATED_COUNT", each _ ?? 0})][c],
    g = Table.Group(Source, "YEAR", {"tbl", f}),
    exp = Table.ExpandTableColumn(g, "tbl", {"WEEK_NUM", "CREATED_COUNT"})
in
    exp

[Fowmy]

@JeevanMallya 

Create a blank Query, go to the Advanced Editor, clear the existing code, and paste the codes give below and follow the steps.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("Vc7LDQAhCEXRXli7QBQ/tRj7b2N4GjOwIfEEzF2LhEUoUVUbc9JOPzXQCNTvqqdhQ+LWtNHZkzIofK8ZFA71XMfDgoj2CC8JDZCzU70gvbCXfvOdIFyDoDtb0f4A", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Year = _t, #"Week Num" = _t, Value = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Year", Int64.Type}, {"Week Num", Int64.Type}, {"Value", Int64.Type}}),
    Table = #"Changed Type",

    __t1 = 
    Table.ExpandListColumn(
        Table.AddColumn( 
            Table.FromColumns( {{List.Min(Table[Year]),List.Max(Table[Year]) }}, {"Years"} ),
            "Weeks",  
            each {1..53},  type number 
        ),
        "Weeks"
    ),
    
    __t2 =  
    Table.ReplaceValue( 
        Table.ExpandTableColumn( 
            Table.NestedJoin(__t1, {"Weeks","Years"}, Table, {"Week Num","Year"}, "Custom1", JoinKind.LeftOuter),"Custom1", {"Value"}, {"Value"}
        ),
        null,0,Replacer.ReplaceValue,{"Value"}
    )
in

Orginal Table:

Result:

[JeevanMallya]

I have a query.

Here for the missing weeks, Value should be zero but in the result i see some values are added.

Like for 2022 , Weeks 1 to 44 should be zero.

[Fowmy]

@JeevanMallya 

I forgot to add the year, now it's fixed please refer my orginal reply.

[AlienSx · Accepted solution]

let
    Source = your_3_columns,
    fifty_three = List.Buffer({0..53}),
    f = (tbl) =>
        [a = tbl & Table.FromColumns({List.Difference(fifty_three, tbl[WEEK_NUM])}, {"WEEK_NUM"}),
        b = Table.Sort(a, "WEEK_NUM"),
        c = Table.TransformColumns(b, {"CREATED_COUNT", each _ ?? 0})][c],
    g = Table.Group(Source, "YEAR", {"tbl", f}),
    exp = Table.ExpandTableColumn(g, "tbl", {"WEEK_NUM", "CREATED_COUNT"})
in
    exp

[JeevanMallya · Accepted solution]

Can you please help me how to build this step wise please.