Fuzzy Merge for Misspelled Names in Power Query M

Merges two tables on a text column using fuzzy matching, so close-but-not-exact spellings still match.

Comparing & LookupsAdvancedfuzzy mergefuzzy matchingmisspelledmerge

Power Query M code

let
    Source = Table.FuzzyNestedJoin(
        YourTable, {"CompanyName"},
        LookupTable, {"CompanyName"},
        "Match", JoinKind.LeftOuter,
        [IgnoreCase = true, IgnoreSpace = true, Threshold = 0.8]
    ),
    Expanded = Table.ExpandTableColumn(Source, "Match", {"CompanyID"}, {"CompanyID"})
in
    Expanded

Notes

Threshold ranges from 0 (match anything) to 1 (exact match only); lower it gradually if valid matches are being missed.

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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