troubleshooting Question

add a unique key to 'message_id' bigint() in an existing table

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rgb192Flag for United States of America asked on
MySQL Server
6 Comments1 Solution476 ViewsLast Modified:
how to add a unique key to an existing table
`message_id` bigint(20) default NULL,


CREATE TABLE `a_messages2` (
  `a_messages_id` int(11) NOT NULL auto_increment,
  `conversation_id` bigint(20) default NULL,
  `profile_id` varchar(20) default NULL,
  `sender` varchar(20) default NULL,
  `message_id` bigint(20) default NULL,
  `message_text` varchar(1000) default NULL,
  `dateAgo` varchar(20) default NULL,
  `message_read` tinyint(4) default NULL,
  `this_user` varchar(20) default NULL,
  PRIMARY KEY  (`a_messages_id`)
) ENGINE=MyISAM AUTO_INCREMENT=7054 DEFAULT CHARSET=utf8;
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