Hi, Does anyone know how to count the number of different id for each year.
I have a data sample from 1990-2010 which contains time series data of different id. The number of different id is different per year.
proc sql;
create table dataout as
select
count(distinct id)
from
datain;
quit;
codes above work for the whole data set but not per year. Thanks in advance
Add a group by year clause in.
Add a group by year clause in.
thanks Reeza
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