Hello, I'm comparing two let variables that have multiple strings in each and I want to be able to tell if a string has been added to the second let variable. For an example if I have the following: %let all_codes_jan = a, b, c, d, e, f; %let all_codes_march = a, b, c, d, e, f, g; I want to find that the code g was added and is a value in the second let variable that is not included in the first let variable. I have used in and not in before in proc sql but I dont know how to do this when there are many codes in each variable, and they are not columns in a table. Thanks in advance for any help you can offer!
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