title: Rollback not working in MySQL
body: <p>I have a user table, and I have 5 records.</p>
  
  <p>I deleted two records, then executed the rollback command, it executed successfully.</p>
  
  <p>But that deleted two records not recovered.</p>
  
  <p>The user table engine is <a href="http://en.wikipedia.org/wiki/InnoDB" rel="noreferrer">InnoDB</a>.</p>