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Flagging Duplicates

Published: Oct 19, 2026 | Updated: Oct 19, 2026 | About (Japanese)

Key points
  • Choose FLAG
  • Enter the range
  • Copy it

In UNIQUE Builder, COUNTIF builds a formula that gives TRUE for duplicated rows.

Steps

  1. Choose FLAG
  2. Enter the range
  3. Copy it
Paste it in the first cell and copy it down.
Use "Build a UNIQUE Formula" (free)

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