Excel Highlight Duplicates and Filter by color alternative

Question

My spreadsheet has about 800,000 rows with 30 columns. Customers are interested in duplicate values only in one column. They need the entire row back. For e.g.

Answer 1

I would create an Is_Duplicated indicator column and use that to filter the duplicated CircleScores:

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UPDATE (per comments):

Alternatively, you can sort the CircleScore column and make the formula a bit less taxing on your system (NOTE CircleScore must be sorted beforehand):