What is a CSV file and how to open it?
If you dont know about it at all, then you should read this post carefully.
What Is a CSV File?

First of all, what is a CSV file?
Each line of the file is a data record.
Each record is composed of one or more fields, separated by commas.
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Using a comma as the field separator is the source of the name of this file format.
These CSV files are usually used to exchange data between different applications.
For instance, databases and contact managers usually support CSV files.

The Structure of the CSV File
The structure of the CSV file is very simple.
This is a comma-separated list of data.
This simplicity is a feature.
CSV files are designed to facilitate exporting data and importing it into other programs.
Related post:4 Ways To Recover Notepad File On Win 10 Quickly
How to Open CSV File?
How to open CSV file?
There are two ways that you might open it.
To view the contents of the CSV file in Notepad, right-smack the file inFile ExplorerorWindows Explorerand selectEdit.