You need to perform the delete in the loop.
%macro apaga;
%do i =1 %to 9;
proc sql noprint;
select nobs into :nobs
from dictionary.tables
where libname = "WORK" and memname = "X&i.";
quit;
%if &nobs. = 0
%then %do;
proc delete data=work.x&i.;
run;
%end;
%end;
%mend;
Thanks, Kurt. Your correction works perfectly!
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