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Powerquery - create index column|Power Query|Excel Forum|My Online Training Hub

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sp_CrumbsHome HomeExcel ForumPower QueryPowerquery - create index column
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Powerquery - create index column
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Percy Bukes

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Forum Posts: 1
Member Since:
January 18, 2020
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January 18, 2020 - 10:57 am
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I have two tables that i need to merge using powerquery. I have two parent/child columns in each table which i can use to merge the tables

However i need to create an index number re-starting the count for each new parent so i can create a unique concatenation

Parent         Child      Index needed

1234          AAA        1

1234         AAA         2

1234         BBB         1

1234        BBB          2

2345        CCC          1

2345        CCC          2

2345        CCC          3

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Catalin Bombea
Iasi, Romania
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November 8, 2013
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January 18, 2020 - 4:00 pm
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Hi Percy,

Steps:

1. Grouping by Parent and Child, return All Rows (no aggregation)

2. Add a new column with AddIndexColumn formula, referring to the newly added column tables.

3. Remove other columns except last one.

4. Expand.

let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Parent", Int64.Type}, {"Child", type text}}),
#"Grouped Rows" = Table.Group(#"Changed Type", {"Parent", "Child"}, {{"All", each _, type table [Parent=number, Child=text]}}),
#"Added Custom" = Table.AddColumn(#"Grouped Rows", "Custom", each Table.AddIndexColumn([All],"Index",1,1)),
#"Removed Other Columns" = Table.SelectColumns(#"Added Custom",{"Custom"}),
#"Expanded Custom" = Table.ExpandTableColumn(#"Removed Other Columns", "Custom", {"Parent", "Child", "Index"}, {"Parent", "Child", "Index"})
in
#"Expanded Custom"

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