I decided at one point to create an extra table to keep some additional records related to another table. What I did is to create a new table and add a column linking to the original table. So there is supposed to be a 1-1 relationship between the rows. Unfortunately, this has not worked out because when I update the main table, the linked table does not get updated. So I want to merge the data from the extra table back into the main table. That is easy to do outside of airtable because it is a simple table join. I did it in R in a few minutes. However, I am not sure about loading the merged table back into airtable as I think it will lose all the links to other table I setup.

The main table looks like:

ID (a formula), Year, Semester, Course, ...

The extra table looks the same but beyond the first few columns (which together uniquely determine the row), it contains different data, e.g., enrollments, etc.

Is there a way inside of airtable to merge the columns from the second table into the main table? I would then delete the second table. I have had quite bad experiences with cutting-and-pasting in airtable because it leads to maximum astonishment (magically adding columns to the destination table and updating entries in linked tables not part of the cut-and-paste), so I would like to avoid that. 

If I do the table join outside of airtable, can I import the result and somehow make the links to other tables work?