title: mysql "datetime NOT NULL DEFAULT '1970-01-01' " gets turned to 0000-00-00 00:00:00
body: <p>I have a column created as </p>
  
  <pre>`date_start` datetime NOT NULL DEFAULT '1970-01-01'</pre>
  
  <p>However when I upload data from a CSV file with the LOAD DATA command with a blank entry for <code>date_start</code> the value saved is 0000-00-00 00:00:00 ?</p>