Extract Text Before / After a Delimiter in Power Query M

Splits a text value at the first occurrence of a delimiter and keeps only the part before or after it.

Text TransformationsBeginnerextractdelimitersplittext

Power Query M code

let
    Source = YourTable,
    AddedBefore = Table.AddColumn(Source, "Before", each Text.BeforeDelimiter([ColumnName], "@"), type text),
    AddedAfter = Table.AddColumn(AddedBefore, "After", each Text.AfterDelimiter([ColumnName], "@"), type text)
in
    AddedAfter

Notes

Replace "@" with the delimiter you need; Text.BeforeDelimiter/AfterDelimiter also accept an index for the Nth occurrence.

Requirements

How to use this snippet

  1. In Power BI Desktop, choose Transform data to open Power Query, then open the Advanced Editor on a query (or start from a blank query).
  2. Paste the snippet and replace the placeholder names (tables, columns, file paths) with your own. Check the requirements above first.
  3. Run it through the Power Query M Formatter to tidy the layout.

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