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I want to import a CSV file and turn that data into a data table, then create another data table that basically edits the whole first column of data, and then exports that data table into a CSV file.

So go ahead and do it then. If you encounter an actual issue along the way, you can ask a specific question about that issue, showing us what you have done and where you're stuck. You should spend some time in the Help Center to learn how this site works and what constitutes a good question.John