Re: [程式] 請問同變數sas加總問題
不好意思關於第二個程式有點問題想要再請教
2.
proc sql;
create table b as
select distinct id, sum(x) as x
from a
group by id;
quit;
請問第三行的 distinct id如果改成*有什麼不一樣的地方
麻煩大大解釋
感激不盡^^
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