title: Execute immediate dbms_output.put_line
body: <p>I have code like this:</p>
  
  <pre><code>set serveroutput on
  
  declare
  v_str varchar2(200);
  begin
  v_str := q'!dbms_output.put_line('Hello world');!';
  Execute immediate v_str;
  end;
  </code></pre>
  
  <p>Oracle SQL Developer says that there's invalid SQL Statement, what's the problem?</p>