Finding duplicates in a column with multiple product #'s
Is there a way to find duplicates when a column may contain multiple product numbers which are comma separated? I was able to get the below formula to flag red when only one event number is duplicated in a one to one ratio, and also have the formula disregard blanks. Any ideas if there is a way to find duplicates when your data is comma separated?
=IF([Event #]1 = 0, 0, IF(COUNTIF([Event #]:[Event #], [Event #1) > 1, 1))
Example of the data
Event003, Event 001