根据 Power Query 中的一列更改 table 的结构

Question

我最近正在为 table 的 Power Query 转换而苦苦挣扎。我一直在尝试来自 Internet 的不同提示，由于旋转，我已经接近了，但由于我缺乏与 PowerQuery 工具相关的知识，我不得不放弃。所以我有一个 table，其中第一列说明给定操作的计划日期和实际日期。它看起来像这样：

当前table的结构

我想重组 table 以先删除 table 并添加到 header“行动 1 计划”、“行动 1 实际” 等等等。所以我的愿望是完成以下情况：

需要table的结构

我一直在尝试不同的事情，但我仍然无法做到这一点。我希望有人能给我一些关于如何完成这项工作的提示。如果有任何建议，我将不胜感激。

Answer 1

经常遇到此类问题，您必须先 unpivot 和 group 才能获得所需的 pivot 结果。

M码

let
    Source = Excel.CurrentWorkbook(){[Name="Table6"]}[Content],

    #"Unpivoted Other Columns" = Table.UnpivotOtherColumns(Source, {"Type of Date", "Project"}, "Attribute", "Value"),

//create the New column headers by merging
    #"Inserted Merged Column" = Table.AddColumn(#"Unpivoted Other Columns", "Op Type", each Text.Combine({[Attribute], [Type of Date]}, " "), type text),
    #"Removed Columns" = Table.RemoveColumns(#"Inserted Merged Column",{"Type of Date", "Attribute"}),

//Group by "Project" and Pivot each grouped table
    #"Grouped Rows" = Table.Group(#"Removed Columns", {"Project"}, {
        {"Pivot", each Table.Pivot(_, List.Distinct(_[#"Op Type"]), "Op Type", "Value")}
        }),

//remove unneeded columns and expand the Pivoted column
    #"Removed Columns1" = Table.RemoveColumns(#"Grouped Rows",{"Project"}),
    #"Expanded Pivot" = Table.ExpandTableColumn(#"Removed Columns1", "Pivot", 
        {"Project", "Operation 1 Planned", "Operation 2 Planned", "Operation 3 Planned", "Operation 4 Planned", "Operation 1 Actual", "Operation 2 Actual", "Operation 3 Actual", "Operation 4 Actual"}, {"Project", "Operation 1 Planned", "Operation 2 Planned", "Operation 3 Planned", "Operation 4 Planned", "Operation 1 Actual", "Operation 2 Actual", "Operation 3 Actual", "Operation 4 Actual"}),

    //type the date columns
    dateCols = List.RemoveFirstN(Table.ColumnNames(#"Expanded Pivot"),1),
    dateTypes = List.Zip({dateCols,List.Repeat({type date}, List.Count(dateCols))}),
    typed = Table.TransformColumnTypes(#"Expanded Pivot",dateTypes)
in
    typed

数据

结果

编辑我注意到结果中的列名顺序 table 不是您在示例中显示的顺序。我在代码中添加了几行以使顺序正确。

试试这个代码：

let
    Source = Excel.CurrentWorkbook(){[Name="Table6"]}[Content],

    #"Unpivoted Other Columns" = Table.UnpivotOtherColumns(Source, {"Type of Date", "Project"}, "Attribute", "Value"),

//create the New column headers by merging
    #"Inserted Merged Column" = Table.AddColumn(#"Unpivoted Other Columns", "Op Type", each Text.Combine({[Attribute], [Type of Date]}, " "), type text),
    #"Removed Columns" = Table.RemoveColumns(#"Inserted Merged Column",{"Type of Date", "Attribute"}),
    //Group by "Project" and Pivot each grouped table

//create list of the Pivot Column Names in the desired order
//Extract a unique list of the names, then sort them => {op1Act, op1Plan, op2Act, op2Plan, ...}
//Split the list (List.Alternate) taking every other 
//    starting with either the first or second entry => {op1Act,op2Act,...}, and {op1Plan,op2Plan...}
//Zip those two lists together with the second list first; then Combine them into a single list
pivotColNames = List.Combine(
                    List.Zip({
                        List.Alternate(List.Sort(List.Distinct(#"Removed Columns"[Op Type])),1,1),
                        List.Alternate(List.Sort(List.Distinct(#"Removed Columns"[Op Type])),1,1,1)
                            })),

    #"Grouped Rows" = Table.Group(#"Removed Columns", {"Project"}, {
        {"Pivot", each Table.Pivot(_, pivotColNames, "Op Type", "Value")}
        }),

//remove unneeded columns and expand the Pivoted column
    #"Removed Columns1" = Table.RemoveColumns(#"Grouped Rows",{"Project"}),

//create column name list for the expanded pivot table, in the desired order
x = List.Combine({{"Project"},pivotColNames}),
    #"Expanded Pivot" = Table.ExpandTableColumn(#"Removed Columns1", "Pivot", 
        x,x),

    //type the date columns
    dateCols = List.RemoveFirstN(Table.ColumnNames(#"Expanded Pivot"),1),
    dateTypes = List.Zip({dateCols,List.Repeat({type date}, List.Count(dateCols))}),
    typed = Table.TransformColumnTypes(#"Expanded Pivot",dateTypes)
in
    typed

新代码的结果

根据 Power Query 中的一列更改 table 的结构

Changing structure of table depending on one colulmn in PowerQuery

excel

pivot

powerquery

transformation

divide