Let's take a look at how you can update existing values in a sheet. It’s another common scenario that can be used for a variety of tasks (e.g. limiting the number of submissions for a particular form or creating a sequentially increasing counter). We’ll use this sample Google Sheet to discuss. It has a row for each employee: Employee Id, Location and Extension.

First, it’s important to note that Google Sheets is not a transactional system like a database and results can be unpredictable if multiple users update the same Sheet at the same time.

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