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credencial's avatar
credencial
Frequent Visitor
5 years ago
Solved

Transforming Data with M

Hi folks, I have a table data:     I need create two more columns like this:     and fill in the START and END columns following the formula:   START = END OF PREVIOUS MONTH (in ...
Need Help
  • Anonymous's avatar
    Anonymous
    5 years ago

    Hi credencial ,

     

    Here is the whole M syntax:

    let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WKk4t0DcyUNJRgiBDAwOlWJ1opfzkEoiwKYgwAysAiefll0HELUCEoRFcIiU1GSJhhKQhFgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Date = _t, Entrance = _t, Exit = _t, End = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type text}, {"Entrance", Int64.Type}, {"Exit", Int64.Type}, {"End", Int64.Type}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 0, 1, Int64.Type),
    #"Added Custom" = Table.AddColumn(#"Added Index", "Custom", each try #"Added Index" [End] {[Index] - 1} otherwise null),
    #"Filled Down" = Table.FillDown(#"Added Custom",{"End"}),
    #"Added Custom1" = Table.AddColumn(#"Filled Down", "Custom.1", each if [Index]=0 then [End] else [End]+List.Sum(List.Range(#"Filled Down"[Entrance],1,[Index]))-List.Sum(List.Range(#"Filled Down"[Exit],1,[Index]))),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom1",{"Custom"}),
    #"Added Custom2" = Table.AddColumn(#"Removed Columns", "Custom", each try #"Added Custom1" [Custom.1]{[Index] - 1} otherwise null),
    #"Removed Columns1" = Table.RemoveColumns(#"Added Custom2",{"Index", "End"}),
    #"Renamed Columns" = Table.RenameColumns(#"Removed Columns1",{{"Custom.1", "End"}, {"Custom", "Start"}})
in
    #"Renamed Columns"

    The final result is this.

     

    Best Regards,

    Stephen Tao

     

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

mahoneypat's avatar
mahoneypat
Microsoft Employee
5 years ago

Here's one way to do it in the query editor.  To see how it works, just create a blank query, open the Advanced Editor and replace the text there with the M code below.  Did you mean to do + Exit - Entrance, since the End date is before the Start date with the formula above?  You can adapt this, if so.

 

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45Wyk8u0TcyUNJRMgURZgZKsTrRSnn5ZRBBCxBhaAQRTUlNhogawZTGAgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Date = _t, Entrance = _t, Exit = _t]),
    #"Added Custom" = Table.AddColumn(Source, "DateForCalc", each "1/"&[Date]),
    #"Changed Type" = Table.TransformColumnTypes(#"Added Custom",{{"Entrance", Int64.Type}, {"Exit", Int64.Type}, {"DateForCalc", type date}}),
    #"Added Custom1" = Table.AddColumn(#"Changed Type", "Start", each Date.EndOfMonth(Date.AddMonths([DateForCalc], -1)), type date),
    #"Added Custom2" = Table.AddColumn(#"Added Custom1", "End", each Date.AddDays([Start], [Entrance] - [Exit]), type date)
in
    #"Added Custom2"

 

Pat

 

  • credencial's avatar
    credencial
    Frequent Visitor
    5 years ago

    Thanks mahoneypat .

     

    I tested your suggestion, but I didn't get the result. Maybe I didn't explain it right. I need this result:

     

     

    • Anonymous's avatar
      Anonymous
      Not applicable
      5 years ago

      Hi credencial ,

       

      Here is the whole M syntax:

      let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WKk4t0DcyUNJRgiBDAwOlWJ1opfzkEoiwKYgwAysAiefll0HELUCEoRFcIiU1GSJhhKQhFgA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Date = _t, Entrance = _t, Exit = _t, End = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type text}, {"Entrance", Int64.Type}, {"Exit", Int64.Type}, {"End", Int64.Type}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 0, 1, Int64.Type),
    #"Added Custom" = Table.AddColumn(#"Added Index", "Custom", each try #"Added Index" [End] {[Index] - 1} otherwise null),
    #"Filled Down" = Table.FillDown(#"Added Custom",{"End"}),
    #"Added Custom1" = Table.AddColumn(#"Filled Down", "Custom.1", each if [Index]=0 then [End] else [End]+List.Sum(List.Range(#"Filled Down"[Entrance],1,[Index]))-List.Sum(List.Range(#"Filled Down"[Exit],1,[Index]))),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom1",{"Custom"}),
    #"Added Custom2" = Table.AddColumn(#"Removed Columns", "Custom", each try #"Added Custom1" [Custom.1]{[Index] - 1} otherwise null),
    #"Removed Columns1" = Table.RemoveColumns(#"Added Custom2",{"Index", "End"}),
    #"Renamed Columns" = Table.RenameColumns(#"Removed Columns1",{{"Custom.1", "End"}, {"Custom", "Start"}})
in
    #"Renamed Columns"

      The final result is this.

       

      Best Regards,

      Stephen Tao

       

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