If I have query like this, how can I refer to values I have already given in update statement, so that I don't need to insert same data to query again? Example I would like to update col1 value with 'xxx', but now I need to enter 'xxx' again in duplicate statement. Is there anyway to refer those values in duplicate statement?

INSERT INTO TABLENAME(col1, col2) 
VALUES (’xxx’, ‘yyy’) 
ON DUPLICATE KEY UPDATE col1 = ‘zzz’
mysql duplicates
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