Question

I’m working on a codeigniter project and I’m trying to troubleshoot a sql issue. I have a query that updates a date field in my table and it’s not updating it at all.

I have this table

CREATE TABLE `Customer` (
  `customer_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `first_name` varchar(55) NOT NULL DEFAULT '',
  `last_name` varchar(55) NOT NULL DEFAULT '',
  `city` varchar(255) DEFAULT '',
  `state` char(2) DEFAULT '',
  `zip` int(5) DEFAULT NULL,
  `title` varchar(255) NOT NULL DEFAULT '',
  `image` varchar(255) DEFAULT '',
  `blurb` blob,
  `end_date` date DEFAULT NULL,
  `goal` int(11) DEFAULT NULL,
  `paypal_acct_num` int(11) DEFAULT NULL,
  `progress_bar` enum('full','half','none') DEFAULT NULL,
  `page_views` int(11) NOT NULL DEFAULT '0',
  `total_pages` int(11) NOT NULL DEFAULT '0',
  `total_conversions` int(11) NOT NULL DEFAULT '0',
  `total_given` int(11) NOT NULL DEFAULT '0',
  `conversion_percentage` int(11) NOT NULL DEFAULT '0',
  `avg_contribution` int(11) NOT NULL DEFAULT '0',
  PRIMARY KEY (`customer_id`)
) ENGINE=MyISAM AUTO_INCREMENT=15 DEFAULT CHARSET=utf8;

and when I run this query to insert data, it runs fine and sets the date to 2012-11-01

INSERT INTO `Customer` (`first_name`, `last_name`, `end_date`) VALUES ('John', 'Smith2', '2012-11-01');

Then I get the customer_id and try to run this query

UPDATE `Customer` SET `end_date` = '2012-14-01' WHERE `customer_id` = '18';

and it sets the date end_date field to 0000-00-00.

Why is it changing the end date to 0000-00-00 rather than 2012-14-01?

Answer 1

2012-14-01 is first day of fourteenth month 🙂

(so its invalid date, thus casted to 0000-00-00 and Data truncated for column 'end_date' at row 1 warning was returned by mysql, which you can see by querying SHOW WARNINGS to mysql immediately after badly behaving query)

2012-01-14 is 14th of January.