Problem description and analysis:
Here below is a data table of names:
Task: Identify whether there are duplicate names, if so, fill in 1 in the corresponding Dup field, otherwise fill in 0.
Solution:
Use SPL XLL and enter the formula in cell B2:
=spl("=if(?1.conj().select(~==?2).count()>1,1,0)",A$2:A$6,A2)
Then drag B2 down to every relevant row:
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✨Plugin Installation Method: SPL XLL Installation and Configuration
✨References to other rich Excel operation cases: Desktop and Excel Data Processing Cases
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