s*******2
发帖数: 499 | 1 59．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.
参考答案选A. 为什么呢？SAS辅导材料上说rename variable会保留index. | z*******4
发帖数: 8 | 2 I think you have to use the "RENAME" statement to preserve the index.
【在 s*******2 的大作中提到】
: 59．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.
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