Append value into multi-valued field if table match

Question

I have two tables. A master table, and a source table. Inside the master table I have a multi-value field named \'completed\' with [Applied, Pledged, Transcripts]. What I want t

Answer 1

Consider INNER JOIN instead of WHERE with a SELECT clause instead of VALUES.

INSERT INTO Contacts (Completed.[Value])
SELECT 'Pledged' AS Data
FROM Source INNER JOIN Contacts ON Source.Email = Contacts.Email;