title: How to configure UTF8 character set in Oracle?
body: <p>How to configure UTF8 character set in Oracle? I've tried to update as follow :</p>
  
  <pre><code>UPDATE NLS_DATABASE_PARAMETERS SET VALUE = 'UTF8' WHERE PARAMETER='NLS_CHARACTERSET';
  </code></pre>
  
  <p>But the error show like that</p>
  
  <pre><code>ERROR at line 1:
  ORA-01031: insufficient privileges
  </code></pre>