Actually is a 3 dataset merge where item_descr producer and brand appear in different datasets, so there isn't the overwriting issue! (I said that i only had 2 datasets A and B just to simplify the question) Anyway I have tried this if index(item_desc,'Nutella') > 0 then do; ... ... end; and it works! Also you supposed right: the text in item_descr is all in uppercase but I didn't need to use this if index(upcase(item_desc,'NUTELLA')>0 then do; ... ... end; because it worked in the first way. Thank you for your help
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