title: upgrade your database to Oracle Database 12c ERROR
body: <p>I have upgrade my database to Oracle Database 12c Release 1 (12.1) and then plug it into a CDB, the automatic SQL Tuning Advisor generates the following error:</p>
  
  <pre><code>ORA-65040: operation not allowed from within a pluggable database
  </code></pre>
  
  <p>what could be the problem ?</p>