title: SQL: How to perform string does not equal
body: <p>I have the following query</p>
  
  <pre><code>SELECT * FROM table
  WHERE tester &lt;&gt; 'username';
  </code></pre>
  
  <p>I am expecting this to return all the results where tester is not the string <code>username</code>, But this not working. I think I am looking for the inverse of the <code>Like</code> operator but I am not sure? In my searches I have found solutions for numbers (that's where i got &lt;> from), but this seems to not be working with strings. </p>