Conditional column in Power Query - excel

Question

I have a table with 3 columns: Name, Property and Value
All names are unique. But there are cases where, for instance, for different Names , both their properties and values are equal at the same time.
I want to add conditional column that would add all Names with line feed delimiter for which properties and values are equal. So for example, for 1st Name I would go to conditional column and would see list of 5 other names that have the same property and value
So far I have tried adding conditional column:
If Property equals Property Then
Else if Value equals Value Then Name
but it just returns values from name column and I dont know to add up these names together
Thanks!

Answer 1

You could group your rows by Property and Value, then combine the Name of for each row.
= Table.Group(Source, {"Property", "Value"}, {{"Names", each Text.Combine(_[Name], ", "), type text}})
Table.Group - like SQL's GROUP BY
Text.Combine - like array joining in other languages, you provide a list and a separator and receive a string
Original table:
| Name | Property | Value |
| ---- | -------- | ----- |
| A | a | 1 |
| B | b | 2 |
| C | a | 2 |
| D | a | 1 |
| E | b | 2 |
Full query:
let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
Grouped = Table.Group(Source, {"Property", "Value"}, {{"Names", each Text.Combine(_[Name], ", "), type text}})
in
Grouped
Result:
| Property | Value | Names |
| -------- | ----- | ----- |
| a | 1 | A, D |
| b | 2 | B, E |
| a | 2 | C |