Count the number of duplicates

Discussion created by genman on Apr 21, 2017
Latest reply on Jul 13, 2017 by philmodjunk

I have a field called Serial No. I would like to create another field which indicates the number of times the exact serial no. has been entered in the database.

So, as I enter a serial my database,  the other field would show a number indicating how many times this serial has been entered.


How can I do this?