title: SQL developer: How to make log output from a trigger?
body: <p>I've made a trigger in SQL and need him to write an output after inserting a new row in the table. Please see the example:</p>
  
  <pre><code>CREATE OR REPLACE TRIGGER GAS_CODES AFTER
    INSERT ON blablatable
  FOR EACH ROW
  
  BEGIN 
  insert into blabla2table (...,...,...,...)
  values (:new...,...,...,..);
  ---output:
  dbms_output.put_line('New row has been added.');
  END;
  /
  </code></pre>
  
  <p>When I compile the trigger, it shows in the Script Output, but if I add a new row into the table, there's nothing.</p>