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,我知道这个程序是为了筛选出国家为德国的数据,
但是题目中用宏变量定义国家是什么情况呢??求大牛解释下~