Adding and importing data for a new custom field

We need to add and import data for a new custom field for existing members. Is it simply a matter of importing a csv with two columns - including one identifier (say username or user ID) and the new field? Would this then append the new field record to each user, or will it wipe out the other fields on import? Is it better practice to export the full database and then re-import the lot including the new field data?

Hello

Unfortunately, it is not possible to include just two columns. So you need a full export, then add data for that new field and then re-import

Before re-importing, please make sure you make a full backup of the database so that in case something goes wrong, you can restore

In this case, maybe it would be safe to write a script to run this import for new field separately

Tuan