title: Does Oracle 'NOT LIKE' expression do not return NULL?
body: <p>I try to query a table with the following query:</p>
  
  <pre><code>select * from name where firstname NOT LIKE 'PETER%' 
  </code></pre>
  
  <p>It is not returning any records where firstname is null. Is this some error or that is how it is? I come from a SQL Server background and getting confused with many things here.  </p>