title: SQL : What does column <> '*.*' mean?
body: <p>I have an existing code where I found below where condition on a table.</p>
  
  <pre><code>SELECT * FROM MYTABLE WHERE MYCOLUMN &lt;&gt; '*.*';
  </code></pre>
  
  <p>Is there a difference between <code>MYCOLUMN &lt;&gt; '*.*'</code> and <code>MYCOLUMN &lt;&gt; '*'</code>;</p>
  
  <p>What does <code>MYCOLUMN &lt;&gt; '*.*'</code> mean?</p>