不知道SAS能不能做到

shiyiming

solved, big thanks all

shiyiming

"观察"是指observation吗?
[code:ivbcuvue]data a;
        input x y;
datalines;
1 2
3 4
3 4
5 6
;

data b;
        input x y;
datalines;
1 2
5 6
7 8
;

proc sql;
        create table temp as
                select * from a
                except all
                select * from b;
quit;[/code:ivbcuvue]

shiyiming

不那么好的方法可以贴出来伐。。。？
[code:2p8x44ez]
data a;
   input x y;
datalines;
1 2
3 4
3 4
5 6
;

data b;
   input x y;
datalines;
1 2
5 6
7 8
;

data c;
    merge a b(in=b);
    by x y;
    if ^b;
run;
[/code:2p8x44ez]
hopewell抛玉引砖了