title: Is pl/sql don't use sql*plus command in Oracle?
body: <p>example:</p>
  
  <pre><code>create or replace procedure DEMO is
  begin
      --host dir
      --execute immediate 'host dir';
  end DEMO;
  </code></pre>
  
  <p>I pupose invoke window's procedure in Oracle.</p>
  
  <p>I try to use @command in sql*plus, but it discontent my requirement.</p>