title: How to get case insensitive records from oracle?
body: <p>How will I get all the <code>customer_names</code> starting from 'a' from <code>customer</code> table? </p>
  
  <p>For this I want to get all the names which contain the letter <code>a</code> irrespective of case sensitivity. I don't want to use <code>to_upper()</code> because it will negatively impact query performance.</p>