How to merge a dynamic column to a table

[anaescobararias]

Hi all,

I have a database that's is updated daily. Every day a new column is added with the cumulative data.

I want to find a way to merge the latest column (the name of the column will match today()) with another table, so I always have the latest numbers of the day for each country.

Any ideas on how to do this?

[Jimmy801 · Accepted solution]

Hello @anaescobararias 

check out this solutions. The first approach is to select column Province and country and the last column (check out step GetProvinceCountryAndLastColumn ). The second approach calculates today date in format MM/DD/YY and then choose this column name instead of the last column. But I saw that the first may is written like 05-01-20 and so this logic would not work. (check step GetProvinceCountryAndTodayColumn).

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUXICYlMgNjQAESCWkYFSbCwA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Province = _t, Country = _t, #"11/23/20" = _t, #"11/24/20" = _t, #"11/25/20" = _t, #"11/26/20" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Province", type text}, {"Country", type text}, {"11/23/20", type text}, {"11/24/20", type text}, {"11/25/20", type text}, {"11/26/20", type text}}),
    GetProvinceCountryAndLastColumn = Table.SelectColumns(#"Changed Type", {"Province","Country"}& {List.Last(Table.ColumnNames(#"Changed Type"))}),
    GetDay = if Text.Length(Text.From(Date.Day(DateTime.FixedLocalNow())))=2 then Text.From(Date.Day(DateTime.FixedLocalNow())) else "0"&Text.From(Date.Day(DateTime.FixedLocalNow())),
    GetMonth =  if Text.Length(Text.From(Date.Month(DateTime.FixedLocalNow())))=2 then Text.From(Date.Month(DateTime.FixedLocalNow())) else "0"&Text.From(Date.Month(DateTime.FixedLocalNow())),
    GetYear = Text.End(Text.From(Date.Year(DateTime.FixedLocalNow())),2),
    CalculateTodayInFormatMMDDYY = GetMonth&"/"&GetDay&"/"&GetYear,
    GetProvinceCountryAndTodayColumn = Table.SelectColumns(#"Changed Type", {"Province","Country"}& {CalculateTodayInFormatMMDDYY})
   
in
    GetProvinceCountryAndTodayColumn

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

[anaescobararias]

This works like a charm!

Thank you @Jimmy801 🙂