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gutenacht (嗯) 于 (Wed Mar 11 19:35:21 2009) 提到:
The following SAS program is submitted:
proc sort data=work.employee;
by descending fname;
proc sort data=work.salary;
by descending fname;
data work.empdata;
merge work.employee
work.salary;
by fname;
run;
Which one of the following statements explains why the program failed execut
ion?
A. The SORT procedures contain invalid syntax.
B. The merged data sets are not permanent SAS data sets.
C. The data set
