Power Query Intermediate Lesson 3: Fuzzy Merge for Misspelt Names

Power Query Intermediate Lesson 3: Fuzzy Merge for Misspelt Names 1

📎 This article includes 3 downloadable practice files ↓

⏱ 2 min read

📘 Power Query Intermediate Course · Lesson 3 of 8

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Names typed by hand never match exactly. Fuzzy merge compares how similar two texts are and matches above a threshold (0 to 1).

In the Merge dialog tick Use fuzzy matching > Fuzzy matching options: Similarity threshold 0.6, Ignore case, Match by combining text parts. In M:

Table.FuzzyNestedJoin(Orders, {"Customer"}, Master, {"Customer"}, "M", JoinKind.LeftOuter,
    [IgnoreCase = true, IgnoreSpace = true, Threshold = 0.6])
Typed Matched (0.6)
sharma traders Sharma Traders
Sharma Trader Sharma Traders
Mehta and Sons Mehta & Sons
Iyer Store Iyer Stores
Das & Company no match
Gupta Agencies no match (not in master)

“Das & Company” vs “Das & Co” is too different at 0.6. Lowering the threshold catches it, but also risks wrong matches. The better fix is a transformation table (Fuzzy matching options): a two-column list “From / To” of known variations, applied before the similarity check.

⚠️ Always review fuzzy matches before using them for money. Add the matched name next to the typed one, as in the expected result, so a person can scan the list.

Practice

Unzip the source files (e.g. to D:\PQ\). Try to build the query with the ribbon first, then compare with the M solution and the expected result. Every solution was run by Excel’s own Power Query engine before publishing.

📎 Practice files for this article

⬇ Download all 3 files (ZIP · 8 KB)

  • 🗂️
    Practice source files (zip)All messy CSVs for the course: invoices, payments, typed customer names, credit history, contacts, branch files, a two-row-header report and an ERP register.
    ⬇ ZIP · 3 KB
  • 📄
    Lesson 3 M solutionThe full query. Paste into Advanced Editor and change the Folder line.
    ⬇ PQ · 908 B
  • 📗
    Expected resultWhat the query returned when Excel ran it, to compare with yours.
    ⬇ XLSX · 5 KB

Free to use for learning. Files with macros (.bas) are plain text — import them with Alt+F11 → File → Import File, and always test on a copy.

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