number of id per date

sasphd — Tue, 23 Feb 2021 18:45:46 GMT

Hello,

I want to calculate the number of id per date or year

data have;
input date id $;
datalines;

1996 5
1996 6
1996 7
1997 1
1998 5
1998 10
1999 11
run;

data want;
input date nbid $;
datalines;

1996 3
1997 1
1998 2
1999 1
run;

Re: number of id per date

PeterClemmensen — Tue, 23 Feb 2021 18:49:06 GMT

proc freq data = have noprint;
   tables date / out=want(drop = percent);
run;