一道sas base programming 的题The following SAS program is submitted: data_null_; set old; put sales1 sales2; run; Where is the output written? A. the SAS log B. the raw data file that was opened last C. the SAS output window or an output file D.

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一道sasbaseprogramming的题ThefollowingSASprogramissubmitted:data_null_;setold;putsales1sales2;run;Wherei

一道sas base programming 的题The following SAS program is submitted: data_null_; set old; put sales1 sales2; run; Where is the output written? A. the SAS log B. the raw data file that was opened last C. the SAS output window or an output file D.
一道sas base programming 的题
The following SAS program is submitted:
data_null_;
set old;
put sales1 sales2;
run;
Where is the output written?
A. the SAS log
B. the raw data file that was opened last
C. the SAS output window or an output file
D. the data set mentioned in the DATA statement
Answer: A
为什麽答案是A?
谢谢!

一道sas base programming 的题The following SAS program is submitted: data_null_; set old; put sales1 sales2; run; Where is the output written? A. the SAS log B. the raw data file that was opened last C. the SAS output window or an output file D.
因为_null_的缘故,data _null_不会输出到output或file.
put sales1 sales2,则是在sas log中输出sales1和sales2的变量值.

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