title: How to select domain name from email address
body: <p>I have email addresses like <code>user1@gmail.com</code>, <code>user2@ymail.com user3@hotmail.com</code> ... etc.
  I want a Mysql <code>SELECT</code> that will trim user names and .com and return output as
  <code>gmail</code>,<code>ymail</code>,<code>hotmail</code>, etc.</p>