是否有等效于 SQL 计数的 IML？

如何解决是否有等效于 SQL 计数的 IML？

在以下示例中，基于变量生成频率

proc iml;
call randseed(1);
Y = sample(2014:2020,3000);
M = sample(1:12,3000);
D = sample(1:31,3000);

create Date var {Y M D};
append;
run;

data Date;
set Date;
format M z2. D z2.;
Year=put(Y,z4. -L);
Month=put(M,z2. -L);
Day=put(D,z2. -L);
drop Y M D;
run;

data Date;
set Date;
Date = catx('-',Year,Month,Day);
drop Year Month Day;
run;

proc sort data=Date; by Date; run;

proc sql;
create table Count as
select Date,count(*) as Frequency from Date
group by Date;
run;

proc IML 中是否有与上一个 proc sql 部分相同的功能？