For instance, if someone said Sam123@gmail.com and also email@example.com-I'd want one of those deleted from the database.
To fix this you need to clean your data first.
This code gets rid of missing e-mails, is there a way to prevent that?
To deal with this you likely need to do it manually.
First sort and then use a data step with first/last but coding an exception for the missing emails.
proc sort data=have; by group_var; run; data want; set have; by group_var; if first.group_var or missing(group_var); run;
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