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.
|
|