If done correctly, Microsoft Excel will open the .csv file, and the results will be the same as with the .txt file process.

To import data from a text file into Microsoft Excel, follow this step-by-step guide: First, create a blank spreadsheet in Microsoft Excel and ensure you have the .txt file on your PC.

How to Open Multiple CSV Files in One Excel Spreadsheet. The CSV file extension appears on text documents that contain comma-separated values. Like spreadsheet data, each line in a CSV file ...

If the DAT file you're trying to open is text, you can convert the file into text in the Microsoft Excel program by first saving it as a CSV file.