#98 — Count Duplicates of Row-Based Data — by Key Column

Judith-Data-Processing-Hacks - Nov 18 '24 - - Dev Community

Problem description & analysis:

Here below is a personnel data table:

source table
Task: Count the number of duplicate data (the judging basis is that the data in the Name field are the same).

Solution:

Use SPL XLL and enter the formula in the cell E2:

=spl("=?1.conj().select(~==?2).count()",B$2:B$7,B2)
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Then drag E2 down to every relevant row:

result table

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