Dear All, i hope someone can help me:  I have two datasets that I would like to connect to each other. In dataset A there are AEs listed and in the variable AECMNO the corresponding CMs (2, 3, 26, 27, 28, 29, 30, 31, 32,33,34). In dataset B, these CMs should be found in the variable CMSPID. I have tried the following statement. unfortunately a: not all hits are listed and b. 1 wrong hit is listed. proc sql; create table AE_CM as select * from test_AE as A left join cm as B on A.SubjectId=B.SubjectId where (AECMNO contains CMSPID); quit;   thank you for your help             ... View more