how do i increase database size from 11GB to above 20Gb
<p>Every time i get below error when ever i try to import new dump into the data base.
How do i increase  db size? Any ways to resolve this, without deleting data from database?</p>

<blockquote>
  <p>ORA-12953: The request exceeds the maximum allowed database size of 11 GB</p>
</blockquote>