Merging Two Messy CSVs: The Key Problems Excel Formulas Hide From You You have two spreadsheets. One is your export, one is the client's. Someone says "just merge them on the ID column.
Source: [Dev.to](https://dev.to/yuhehe/merging-two-messy-csvs-the-key-problems-excel-formulas-hide-from-you-1loj)