proc sql;
create table in_tab12 as select *,
count(distinct laptopID) as duplic
from in_tab1
group by Referral_number
having duplic > 1;
run;
My Statistical tools and consulting service
Statsitics, Research Methods, SAS, R, HLM, Rasch model
proc sql;
create table in_tab12 as select *,
count(distinct laptopID) as duplic
from in_tab1
group by Referral_number
having duplic > 1;
run;