Excel 更正如下所示的列，其余步骤相同

以下是幕后的M代码，供您参考

let
    Source = Excel.CurrentWorkbook(){[Name="RawData"]}[Content],
    #"Filter [null]" = Table.SelectRows(Source, each [ID] <> null and [ID] <> ""),
    #"Remove [Duplicates]" = Table.Distinct(#"Filter [null]", {"ID"}),
    #"Unpivot [Table]" = Table.UnpivotOtherColumns(#"Remove [Duplicates]", {"ID"}, "Date", "TM"),
    #"Detect Data Type" = Table.TransformColumnTypes(#"Unpivot [Table]",{{"ID", Int64.Type}, {"Date", type date}, {"TM", type text}}),
    #"Group [Table]" = Table.Group(#"Detect Data Type", {"ID", "TM"}, {{"From", each List.Min([Date]), type date}, {"On", each List.Max([Date]), type date}}, GroupKind.Local),
    #"Sorted Rows" = Table.Sort(#"Group [Table]",{{"ID", Order.Ascending}, {"From", Order.Ascending}}),
    #"Added Index" = Table.AddIndexColumn(#"Sorted Rows", "Index", 0, 1),
    #"Added Index1" = Table.AddIndexColumn(#"Added Index", "Index.1", 1, 1),
    #"Merged Queries" = Table.NestedJoin(#"Added Index1", {"ID", "Index.1"}, #"Added Index1", {"ID", "Index"}, "Added Index1", JoinKind.LeftOuter),
    #"Expanded Added Index1" = Table.ExpandTableColumn(#"Merged Queries", "Added Index1", {"From"}, {"Added Index1.From"}),
    #"Added Custom" = Table.AddColumn(#"Expanded Added Index1", "To", each if [Added Index1.From]=null then [On] else Date.AddDays([Added Index1.From],-1)),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"On","Index", "Index.1", "Added Index1.From"})
in
    #"Removed Columns"

let
Source=Excel.CurrentWorkbook（）{[Name=“RawData”]}[Content]，
#“Filter[null]”=表。选择行（源、每个[ID]null和[ID]“”），
#“Remove[Duplicates]”=Table.Distinct（#“Filter[null]”，{“ID}），
#“Unpivot[Table]”=Table.UnpivotOtherColumns（#“Remove[Duplicates]”，{ID}，Date，，“TM”），
#“检测数据类型”=表.TransformColumnTypes（#“Unpivot[Table]”，{{{“ID”，Int64.Type}，{“Date”，Type Date}，{“TM”，Type text}），
#“Group[Table]”=Table.Group（#“Detect Data Type”、{“ID”、“TM”}、{“From”、each List.Min（[Date]）、Type Date}、{“On”、each List.Max（[Date]）、Type Date}}、GroupKind.Local），
#“排序行”=表.Sort（#“组[表]”，{{“ID”，Order.升序}，{“From”，Order.升序}），
#“添加的索引”=表.AddIndexColumn（#“排序行”，“索引”，0,1），
#“添加的索引1”=表AddIndexColumn（#“添加的索引”、“索引1”、1、1），
#“合并查询”=表.NestedJoin（#“Added Index1”、{“ID”、“Index.1”}、#“Added Index1”、{“ID”、“Index”}、“Added Index1”、JoinKind.LeftOuter），
#“Expanded Added Index1”=Table.ExpandTableColumn（#“合并查询”、“Added Index1”、{“From”}、{“Added Index1.From”}），
#“Added Custom”=Table.AddColumn（#“Expanded Added Index1”、“To”），如果[Added Index1.From]=null，则为[On]else Date.AddDays（[Added Index1.From]，-1）），
#“Removed Columns”=Table.RemoveColumns（#“Added Custom”、{“On”、“Index”、“Index.1”、“Added Index1.From”}）
在里面
#“删除的列”

---

如果你有任何问题，请告诉我。干杯：）

如何使用函数

Date.AddDays

？您可以通过添加负数的天数来减去天数。关于使用函数

Date.AddDays

？您可以通过添加负数的天数来减去天数

+----+----------+----------+----------+
| ID |   Name   |   From   |    To    |
+----+----------+----------+----------+
| 00 | Darell   | 12/29/14 | 01/05/15 |
| 00 | Kamala   | 01/12/15 | ...      |
| 01 | Jarrod   | 12/29/14 | 12/29/14 |
| 01 | Annelle  | 01/05/15 | 01/05/15 |
| 01 | Todd     | 01/12/15 | ....     |
| 04 | Lakeesha | 12/29/14 | 12/29/14 |
| 04 | Linn     | 01/05/15 | ....     |
| .. | ........ | ....     | ....     |
+----+----------+----------+----------+

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

#"Unpivot [Table]" = Table.UnpivotOtherColumns(Source, {"ID"}, "Date", "Name"),

#"Group [Table]" = Table.Group(#"Unpivot [Table]", {"ID", "Name"}, {{"From", each List.Min([Date]), type date}, {"On", each List.Max([Date]), type date}}, GroupKind.Local)

in
#"Group [Table]"

+----+----------+----------+----------+
| ID |   Name   |   From   |    To    |
+----+----------+----------+----------+
| 00 | Darell   | 12/29/14 | 01/11/15 |
| 00 | Kamala   | 01/12/15 | ....     |
| 01 | Jarrod   | 12/29/14 | 01/04/15 |
| 01 | Annelle  | 01/05/15 | 01/11/15 |
| 01 | Todd     | 01/12/15 | ....     |
| 04 | Lakeesha | 12/29/14 | 01/04/15 |
| 04 | Linn     | 01/05/15 | ....     |
| .. | ........ | ....     | ....     |
+----+----------+----------+----------+

Table.AddColumn(#"Calculate [To]", "Date", each { Number.From([From])..Number.From([To]) })

let
    Source = Excel.CurrentWorkbook(){[Name="RawData"]}[Content],
    #"Filter [null]" = Table.SelectRows(Source, each [ID] <> null and [ID] <> ""),
    #"Remove [Duplicates]" = Table.Distinct(#"Filter [null]", {"ID"}),
    #"Unpivot [Table]" = Table.UnpivotOtherColumns(#"Remove [Duplicates]", {"ID"}, "Date", "TM"),
    #"Detect Data Type" = Table.TransformColumnTypes(#"Unpivot [Table]",{{"ID", Int64.Type}, {"Date", type date}, {"TM", type text}}),
    #"Group [Table]" = Table.Group(#"Detect Data Type", {"ID", "TM"}, {{"From", each List.Min([Date]), type date}, {"On", each List.Max([Date]), type date}}, GroupKind.Local),
    #"Sorted Rows" = Table.Sort(#"Group [Table]",{{"ID", Order.Ascending}, {"From", Order.Ascending}}),
    #"Added Index" = Table.AddIndexColumn(#"Sorted Rows", "Index", 0, 1),
    #"Added Index1" = Table.AddIndexColumn(#"Added Index", "Index.1", 1, 1),
    #"Merged Queries" = Table.NestedJoin(#"Added Index1", {"ID", "Index.1"}, #"Added Index1", {"ID", "Index"}, "Added Index1", JoinKind.LeftOuter),
    #"Expanded Added Index1" = Table.ExpandTableColumn(#"Merged Queries", "Added Index1", {"From"}, {"Added Index1.From"}),
    #"Added Custom" = Table.AddColumn(#"Expanded Added Index1", "To", each if [Added Index1.From]=null then [On] else Date.AddDays([Added Index1.From],-1)),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"On","Index", "Index.1", "Added Index1.From"})
in
    #"Removed Columns"