- data a1;set a;k=1;drop num;run;
- data b1;set b;k=1;drop num;run;
- proc sql;
- create table c as
- select a1.*,b1.date,b1.question from a1 inner join b1 on a1.k=b1.k;
- quit;
- data c1;
- set c;
- if kindex(question,patentname) and date gt time then output;
- run;


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