Prevent Duplicate Data Entry in Excel with a Custom Formula - Swahili & English language

In this tutorial, I walk you through the steps to prevent duplicate data entry in Excel using a custom formula. Whether you're managing a small database or large datasets, ensuring unique entries is crucial to maintaining data integrity. This video will show you how to set up custom data validation rules that automatically block duplicates.

What You'll Learn:
How to create a custom formula to prevent duplicate entries
Setting up data validation rules in Excel
Practical examples to apply in your spreadsheets
Why This Matters: Duplicate data can lead to errors, confusion, and inefficiencies. With this simple technique, you can avoid these issues and keep your data clean and accurate.

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