I set up a base using the De-duplication Routine, but I had to copy and paste the checkmark (helpful suggestion) into the first field in Table 2 and then there were checkmarks showing up in all the records in Table 1 (Dupe Check field) and for all records in Dupe? field too, so I don’t know how to correct this. If I didn’t copy the checkmark, I would get no checkmark/s at all and I tried many times. I should also mention that I am using the free version of Airtable on my MacBook, High Sierra 10.13, so I don’t know if this makes a difference in terms of the checkmark showing automatically, as opposed to another version, were it does show up automatically or if it’s the set up sequence. The sequence I used is: I linked the two tables first, then I set up the Rollup features and added the formulas accordingly, then at the very end, I would link all the records from Table 2, so I hope I did that right.
I copied and pasted a second set of records, to see if the de-duplication worked, but there were just checkmarks showing in all records in Dupe? field, which worked I suppose, it’s hard to tell with all the Checkmarks.
The CSV import file that I emailed you is the file that I have been testing with.
This is the link to the base that I was describing above:
I have also included a link to another version of the same base as above, except it is before I copied and pasted the checkmark, so you can see an unadulterated version and I also copied the same records twice, to see if the checkmark would appear automatically, but it did not:
Thank you very much for your help and patience while I work my way through this.