Comment by CrypticShift

I mean that when I import a new CSV, I sometimes want to merge its rows with an existing Anytype database objects if key columns are identical.

For larger personal databases, I find that I often need to clean them up or enrich them with web APIs. Therefore, I will export the data, manipulate it elsewhere, and then reimport it. This requires the data to be "merged" with the existing records in order to preserve the existing IDs, links, and so on.