I currently am working on creating filled out contacts in data set 1. I have around 600 names, some filled, some missing phone numbers. This set of data has several columns but the only one I'm focusing on is phone numbers. I have a second set of data that has names and phone numbers (contacts exported from a phone into a csv.). This set has around 3000 contacts. I need to find the matching names that are in set 1 and set 2, and then move the phone numbers of those matching names into set 1. The result should be set 1 now with more phone numbers filled out because I used set 2. Does anyone know how to efficently do this rather than going down the list and searching for a matching name?
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