title: Conditional where clause in Mysql
body: <p>How to use Conditional where clause in Mysql?</p>
  
  <pre><code>Select * from table where SubId='1' and null
  </code></pre>
  
  <p>Is it right? I want to display records with subId=1 and rows with subId null</p>
  
  <p>Any suggestion...</p>