I have this data :
| Parent | Child | Type |
| 1 | 3 | E |
| 2 | 102 | F |
| 3 | 5 | F |
| 3 | 4 | E |
| 4 | 6 | E |
| 7 | 170 | F |
| 8 | 9 | E |
| 9 | 10 | E |
| 10 | 11 | E |
| 11 | 110 | F |
| 12 | 120 | F |
| 13 | 14 | E |
| 14 | 140 | F |
| 15 | 16 | E |
| 16 | 160 | F |
| 17 | 18 | E |
| 18 | 19 | E |
| 19 | 20 | E |
| 21 | 20 | E |
| 20 | 200 | F |
Suppose i filter for Parent: 8, I should be able to see :
| 8 | 9 | E |
| 9 | 10 | E |
| 10 | 11 | E |
| 11 | 110 | F |
E - means it has a further sub or child, F means it is the last node. How can i model the Power Query to get this result ?
I have this code, but it wont work when i have duplicates in Parent / Child
let
Source = Excel.Workbook(File.Contents("C:\Users\e768534\Desktop\Book1.xlsx"), null, true),
Sheet1_Sheet = Source{[Item="Sheet1",Kind="Sheet"]}[Data],
#"Promoted Headers" = Table.PromoteHeaders(Sheet1_Sheet, [PromoteAllScalars=true]),
#"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"Child", type text}, {"Parent", type text}}),
RenamedColumns = Table.RenameColumns(#"Changed Type",{{"Parent", "Name"}, {"Child", "Value"}}),
R = Record.FromTable(RenamedColumns),
HierarchyLevelLimit = 5,
StepBack = RenamedColumns,
Ad_GenLev = Table.AddColumn(StepBack, "GenLev", each
List.Generate(
()=> [ y = [Name], z = {y} ],
each [y] <> null and (if List.Contains({0, ""}, HierarchyLevelLimit) then true else List.Count([z]) <= HierarchyLevelLimit + 1),
each [ y = Record.FieldOrDefault(R, [y], null), z = [z] & {y} ],
each [y] ), type {text} ),
Ad_Levels = Table.AddColumn(Ad_GenLev, "Levels", each
[ a = List.Zip({ {"1"..Text.From(List.Count([GenLev])-1)}, List.Reverse(List.Skip([GenLev])) }),
b = List.Accumulate(a, #table(type table[Child=text], {{[Name]}}), (st, cur)=> Table.AddColumn(st, "Level_" & cur{0}, (x)=> cur{1}, type text))
][b], type table ),
CombinedLevels = Table.Combine(Ad_Levels[Levels])
in
CombinedLevels