解答什么？

1到10中随即抽取4个不同数字，排列组合210种情况的的SAS程序

data a;
input a  @@;
cards;
1 2 3 4 5 6 7 8 9 10
;
run;
data b;
set a(rename=(a=b));
run;
data c;
set a(rename=(a=c));
run;
data d;
set a(rename=(a=d));
run;


proc sql;
select  * from a,b,c,d
where a ne b and a ne c and a ne d and b ne c and b ne d and c ne d;
quit;

最后结果是5040个组合噢！！！

data a;
input a  @@;
cards;
1 2 3 4 5 6 7 8 9 10
;
run;
data b;
set a(rename=(a=b));
run;
data c;
set a(rename=(a=c));
run;
data d;
set a(rename=(a=d));
run;


proc sql;
select  * from a,b,c,d
where a ne b and a ne c and a ne d and b ne c and b ne d and c ne d;
quit;

最后结果是5040个组合噢！！！

热心帮助他人