單項選擇題哪個指針控件用于按順序讀取多個記錄?()

A.@n
B.+n
C./
D.all of the above


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2.單項選擇題

下面哪一段代碼可以生成下述結(jié)果?()

A.data _null_;set work.scores;file ’c:\data\teamdat’dlm=’,’;put name highscore team;run;
B.data _null_;set work.scores;file ’c:\data\teamdat’dlm=’’;put name highscore team;run;
C.data _null_;set work.scores;file ’c:\data\teamdat’dsd;put name highscore team;run;
D.data _null_;set work.scores;file ’c:\data\teamdat’;put name highscore team;run;

3.單項選擇題

下述程序運行后,變量順序是?()
data perm.update;
infile invent;
input IDnum $15-19Item $1-13Instock 21-22
BackOrd 24-25;
Total=instock+backord;
run;

A.IDnum;Item;InStock;BackOrd ;Total
B.Item;IDnum ;InStock ;BackOrd ;Total
C.Total;IDnum;Item ;InStock ;BackOrd
D.Total;Item ;IDnum ;InStock ;BackOrd

5.單項選擇題在編譯階段不會發(fā)生()。

A.創(chuàng)建數(shù)據(jù)集描述
B.創(chuàng)建第一條觀測
C.創(chuàng)建PDV
D.創(chuàng)建_N__ERROR_自動變量