id date
2309 04/14/2013
2309 05/01/2013
2309 05/21/2013
2309 06/21/2013
Looking output like
ID initialdate Recent
2309 04/14/2013 06/21/2013
PROC SQL;
SELECT
ID,
MIN(DATE) AS INITIALDATE,
MAX(DATE) AS RECENT
FROM
WORK.DATA
GROUP BY ID;
QUIT;
data have;
input id date mmddyy10.;
cards;
2309 04/14/2013
2309 05/01/2013
2309 05/21/2013
2309 06/21/2013
;
data want(drop=date);
retain id initialdate;
set have;
by id;
if first.id then initialdate=date;
Recent=ifn(last.id,date,.);
if last.id;
format initialdate Recent mmddyy10.;
proc print;run;
Obs id initialdate Recent
1 2309 04/14/2002 06/21/2002
Thanks you very helpful!
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