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Google Sheets

Dedupe in Google Sheets: A Step-by-Step Guide

Removing duplicate values from your data is a crucial step in maintaining accuracy and clarity. In this step-by-step guide, we'll explore the process of deduplication (dedupe) in Google Sheets, enabling you to streamline your datasets effectively.

Recognizing the Importance of Deduplication

Deduplication helps eliminate redundancy and ensures data integrity by removing duplicate entries. Mastering the techniques for deduping in Google Sheets is crucial for maintaining clean and accurate datasets.

Method 1: Selecting Data for Deduplication

Learn the foundational method of selecting the data you want to dedupe in Google Sheets. Understand how to highlight the relevant columns or rows containing duplicate values.

Method 2: Accessing the "Remove duplicates" Option

Explore the process of accessing the "Remove duplicates" option in Google Sheets. Learn how to navigate to "Data" > "Data cleanup" > "Remove duplicates" to open the Remove duplicates dialog box.

Method 3: Choosing Columns for Deduplication

Dive into choosing the columns for deduplication. Understand how to specify the columns based on which you want to identify and remove duplicate values.

Method 4: Reviewing and Confirming Deduplication

Learn how to review the potential changes before confirming deduplication. Understand how to preview the values that will be kept and remove any unwanted duplicates before finalizing the process.

Method 5: Deduplication with Google Apps Script

Explore advanced deduplication using Google Apps Script for customized automation. Learn how to create scripts that automatically identify and remove duplicates based on specific criteria, providing a powerful tool for dynamic data cleaning.


In conclusion, deduplication in Google Sheets is a critical process for maintaining clean and accurate data. Whether you're selecting data, accessing the "Remove duplicates" option, choosing columns for deduplication, reviewing changes, or exploring automation with Google Apps Script, the methods outlined in this guide provide a comprehensive toolkit for deduplication. By incorporating these techniques into your spreadsheet workflow, you'll enhance your ability to efficiently clean and manage data in Google Sheets.