 <p>With the default options, it will not delete tables <code>A</code>, <code>B</code> and <code>C</code>. It will however overwrite (delete current data that is not in the backup) tables <code>D</code>, <code>E</code> and <code>F</code>.</p> <p>To see the list of available options <a href="http://dev.mysql.com/doc/refman/5.1/en/mysqldump.html">see here</a>.</p>