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SAS
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資料處理
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熟悉
[問題敘述]:
大家好
不好意思想請教一題 SAS 考試的題目:
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
我兩次都選Ｃ
不知道有沒有版友知道為什麼選Ａ呢
謝謝大家！
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