A couple things:
- You posted this twice. You should delete one.
- After you delete one, you'll need to provide more context/details.
It seems you are saying that you have multiple files (Excel, text, other data?) with a specific column and you want to read the data from those files and create, or add to, a single file.
If you can provide an example (screen shot) of what the data looks like, what type of files, where they are housed/stored, that information will make providing a cogent answer easier.