Comparing two CSV exports sounds simple until the files get large. A common situation is having an older export and a newer export and wanting to answer four questions: Which rows were added? Which rows were removed?
Source: [Dev.to](https://dev.to/darkness_c8f5d00f0e37324d/how-to-compare-two-large-csv-files-without-uploading-the-data-1nnm)