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  • Just to clarify, these are the headers of columns that you are showing. There is actual data beneath each column? Commented Nov 1, 2018 at 19:15
  • @Kusalananda I have clarified it in my edit. These are column headers. I am not providing the data. I can if you want. Commented Nov 1, 2018 at 19:15
  • @JeffSchaller Yes, Jeff. I did it now. Sorry for the inconveniences. Commented Nov 1, 2018 at 19:30
  • does the data in file2's matching columns always exist in file1, or would we have to fill in something like "n/a" for missing pairs/triplets? Commented Nov 1, 2018 at 19:35
  • @JeffSchaller Yes. both the files contain same records. So just need to have an extra 'E' column from File2 to file1. Commented Nov 1, 2018 at 19:37