SQL & PL/SQL

Hi


I am trying to see the output of a simple update trigger program, but it seems its not getting fired or probably i dont know how to see its result .

If the trigger results in inserting data into another table ..i am getting such a result but not on the screen .

I have tried enabling the trigger and read forum too but i am not getting it at all

please help ..

create or replace trigger print_salary_changes
  BEFORE delete or insert or update OF SALARY on employees
  for each row
     when(new.job_id<> 'AD_PRES') 
  declare
      sal_diff number;
   BEGIN   
      sal_diff:=:new.salary - :old.salary;
      dbms_output.put(:new.last_name||',');
      dbms_output.put('olD SALARY='||:old.salary||',');
      dbms_output.put('nEW SALARY='||:new.salary||',');
      dbms_output.put('Difference'||sal_diff);

 end;
 /

TRIGGER print_salary_changes compiled

If i try to update i do get the updated rows but not the trigger result .

update employees
set salary= salary*1.07
where department_id in(10,20,90);

6 rows updated.


Thanks

Edited by: to_learn on Dec 28, 2011 3:33 PM