In D2k 11g, while generating the report from the URL How to save the generated text / PDF file to Local Machine automatically while running the report?

We can restrict duplicate entries in the form cheak which coloum can be maintained uniquenessfor that coloumn item text write a trigger when_key_navigatedeclaree_empno number(5);cursor c is select * from emp;beginfor i in e_emp loopif e_empno= i.empno then dbms_output.put_line("already exist");end if;end loop;:empno=e_empno;end;