PowerQuery 多个文件并添加列

Question

我有内联 PowerQuery 来自动执行我的每周报告。由于我是电源查询的新手，所以我跟进了这个 tutorial and try to add a custom column so I can use it to see week over week improvements, the thing is that the column that is added is not named "Week" but instead it is called the name of the file. From this webpage 第二个参数是列名。我不明白为什么列名是文件名而不是名称 "week".

let ExcelFile = (FilePath, FileName) =>
let
    Source = Folder.Files(FilePath),
    File = Source{[#"Folder Path"=FilePath,Name=FileName]}[Content],
    ImportedExcel = Excel.Workbook(File),
    Sheet1 = ImportedExcel{[Name="Page1_1"]}[Data],
    TableWithWeek = Table.AddColumn(Sheet1,"Week", each FileName),
    TableWithoutHeader = Table.Skip(TableWithWeek,3),
    FirstRowAsHeader = Table.PromoteHeaders(TableWithoutHeader)
in
    FirstRowAsHeader
in
    ExcelFile

Answer 1

这次通话：

FirstRowAsHeader = Table.PromoteHeaders(TableWithoutHeader)

将用第一行中的值替换您拥有的列名。由于 "Week" 列下的第一个值是文件名，因此您的 table 现在将使用该文件名作为列名。

您可以通过在使用 PromoteHeaders 后添加自定义列来解决此问题：

let ExcelFile = (FilePath, FileName) =>
    let
        Source = Folder.Files(FilePath),
        File = Source{[#"Folder Path"=FilePath,Name=FileName]}[Content],
        ImportedExcel = Excel.Workbook(File),
        Sheet1 = ImportedExcel{[Name="Page1_1"]}[Data],
        TableWithoutHeader = Table.Skip(Sheet1, 3),
        FirstRowAsHeader = Table.PromoteHeaders(TableWithoutHeader),
        TableWithWeek = Table.AddColumn(FirstRowAsHeader,"Week", each FileName),
    in
        TableWithWeek
in
    ExcelFile

PowerQuery 多个文件并添加列

PowerQuery multiple files and add column

excel-2010

powerquery