how can I modify table structure to make this query run

CREATE TABLE `renters` (
  `id` int(11) NOT NULL auto_increment,
  `first_name` varchar(100) default NULL,
  `last_name` varchar(100) default NULL,
  `email1` varchar(100) default NULL,
  `email2` varchar(100) default NULL,
  `email3` varchar(100) default NULL,
  `phone1` varchar(20) default NULL,
  `phone2` varchar(20) default NULL,
  `phone3` varchar(20) default NULL,
  `information` varchar(4000) default NULL,
  `description` varchar(9000) default NULL,
  PRIMARY KEY  (`id`),
  UNIQUE KEY `email1` (`email1`)
) ENGINE=MyISAM AUTO_INCREMENT=32 DEFAULT CHARSET=utf8$$








INSERT INTO renters (first_name,last_name,email1,email2,email3,phone1,phone2,phone3,information,description) VALUES ('test','','derrickjmiller1@gmail.com','','','','','','','') ON DUPLICATE KEY UPDATE renters set description=concat(description,'somthing to add to description')

Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'set description=concat(description,'somthing to add to description')' at line 1




how can I modify table structure to make this query run

to add to column description in that row where email1 is there
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rgb192Asked:
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johanntagleConnect With a Mentor Commented:
There's no need to modify the table.  You just need to correct your insert statement.  Please take time to look at the manuals and check the correct syntax for the command you are using.  See http://dev.mysql.com/doc/refman/5.5/en/insert-on-duplicate.html

After ON DUPLICATE KEY UPDATE there's no need to repeat the table name nor use the keyword "set".  It should just be:

INSERT INTO renters (first_name,last_name,email1,email2,email3,phone1,phone2,phone3,information,description) VALUES ('test','','derrickjmiller1@gmail.com','','','','','','','') 
ON DUPLICATE KEY UPDATE description=concat(description,'somthing to add to description');

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rgb192Author Commented:
ON DUPLICATE KEY UPDATE

works

and
my query had too many words

and thanks for the link
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