Mine

DROP TABLE IF EXISTS `Attachments`;
CREATE TABLE `Attachments` (
  `id` int(11) NOT NULL auto_increment,
  `TransactionId` int(11) NOT NULL default '0',
  `Parent` int(11) NOT NULL default '0',
  `MessageId` varchar(160) default NULL,
  `Subject` varchar(255) default NULL,
  `Filename` varchar(255) default NULL,
  `ContentType` varchar(80) default NULL,
  `ContentEncoding` varchar(80) default NULL,
  `Content` longtext,
  `Headers` longtext,
  `Creator` int(11) NOT NULL default '0',
  `Created` datetime default NULL,
  PRIMARY KEY  (`id`),
  KEY `Attachments1` (`Parent`),
  KEY `Attachments2` (`TransactionId`),
  KEY `Attachments3` (`Parent`,`TransactionId`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;