作者AmigoSafin ()
看板Statistics
标题[程式] SAS index问题一问
时间Sun Dec 9 00:03:31 2018
[软体程式类别]:
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SAS
[程式问题]:
资料处理、回归、叙述统计、logistic、probit...等
资料处理
[软体熟悉度]:
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熟悉
[问题叙述]:
大家好
不好意思想请教一题 SAS 考试的题目:
The SAS data set WORK.TEST has an index on the variable ID and the following
SAS program is submitted.
data WORK.TEST;
set WORK.TEST(
keep=ID Var_1 Var_2
rename=(ID=ID_Code);
Total=sum(Var_1 Var_2);
run;
Which describes the result of submitting the SAS program?
A.
The index on ID is deleted.
B.
The index on ID is updated as an index on ID_Code.
C.
The index on ID is deleted and an index on ID_Code is created.
D.
The index on ID is recreated as an index on ID_Code.
答案是A
我两次都选Ｃ
不知道有没有版友知道为什麽选Ａ呢
谢谢大家！
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