3. Rewrite the following SAS code by defining a SAS Macro variable for country.
data clientSummary_GERMANY;
set clientSummary;
if index(compress(upcase(Country)), 'GERMANY')=0 then delete;
run;
SAS小白,我知道這個程序是為了篩選出國家為德國的數(shù)據(jù),
但是題目中用宏變量定義國家是什么情況呢??求大牛解釋下~