How to Extract Unique & Sorted Values from Each Column in Power Query

Описание: #PowerQuery #ExcelTips #DataCleaning #UniqueValues #PowerQueryTutorial

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Power Query M Code – Step-by-Step Explanation

Source Step
Loads the table named "Table1" from the current Excel workbook.

Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
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Table.ToColumns

Converts the table into a list of columns (each column as a separate list).
For example, columns A, B, and C become three separate lists:
Column A → List 1
Column B → List 2
Column C → List 3
This step prepares each column for individual processing.

Table.ToColumns(Source)
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List.Transform with Sort & Distinct

Processes each column list by sorting and removing duplicates.
`List.Sort(_)` → Sorts values in ascending order.
`List.Distinct(...)` → Removes duplicate values.
Result: Each column contains unique, sorted values.

List.Transform(
Table.ToColumns(Source),
each List.Distinct(List.Sort(_))
)
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Table.FromColumns

Converts the list of transformed columns back into a table.
Defines the table schema with specific data types:
A → Int64.Type
B → Int64.Type
C → Int64.Type
This ensures the final table has the correct column names and types.

Table.FromColumns(
...,
type table[A=Int64.Type, B=Int64.Type, C=Int64.Type]
)
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Result Step
Stores the final transformed table as Result, which is the output of this query.

Result = ...
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*Code Summary in One Sentence*
Creates a new table from "Table1" with each column containing only unique and sorted values.