I have a loop with while that is reading a file and then makes a query of these values.But when I'm trying to show a message with dbms_output.put_line it says :  dbms_output.put_line(henry);                        *ERROR at line 15:ORA-06550: line 15, column 25:PLS-00201: identifier 'HENRY' must be declaredORA-06550: line 15, column 4:PL/SQL: Statement ignoredI don't understand this, because if I use the value of the variable in a query, it is ok.
display unix variable with dbms_output.put_line
shell script;sql;oracle