Hello,   I have got a SAS .egp that does a evaluation of data for different cases and then puts this data in one Excel-file with 6 data sheets.   Now I have to change the program: so that in the data step where the cases are checked, should the program check if the ID is not in a CSV file (one column with the IDs only). How can I do this?   I have already this:   proc import datafile="temp.csv" out=temp dbms=csv replace; getnames=no; run; proc print data=work.temp; run; And now I want to check it with this code: data schritt2; /* this is working correctly */ set data_table; /* contains colums ARBEITSSTUNDENBEZAHLT, PERSONALNUMMER etc. */ if ARBEITSSTUNDENBEZAHLT >400; /* this is what I added: */ %LET var=PERSONALNUMMER; proc sql; select * from WORK.TEMP where VAR1 = var; quit; /* how to do this? */ if (ergebnis != TRUE); run; I hope someone could give me a hint.   Thanks Sebastian   ... View more