How can I delete duplicates of one variable based on a start date using NODUPKEY?
Thanks!
Sort it twice. First time with email address and date, second with email address and the NODUPKEY option.
Provide more details.
@lboyd wrote:
How can I delete duplicates of one variable based on a start date using NODUPKEY?
Thanks!
Sort it twice. First time with email address and date, second with email address and the NODUPKEY option.
For instance, if someone said Sam123@gmail.com and also sam123@gmail.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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