M Query Snippets (Power BI)

Combine csv files with different structures over time

let
    Source = SharePoint.Files("https://yourdomain.sharepoint.com/sites/<yoursitename>/", [ApiVersion = 15]),
    #"Filtered rows 1" = Table.SelectRows(Source, each Text.Contains([Folder Path], "<FolderName>/csv")),
    #"StepOne" = Table.AddColumn(#"Filtered rows 1", "tables", each   Table.PromoteHeaders(Csv.Document([Content],[Delimiter=",",Encoding=1252, QuoteStyle=QuoteStyle.None]))),
    #"StepTwo" = Table.SelectColumns(#"StepOne", {"Name", "tables"}),
    allCSV=Table.Combine(#"StepTwo"[tables])
in
    allCSV