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Asked: 2026-05-11T14:38:56+00:00

I have got a problem with two tables: CREATE TABLE IF NOT EXISTS `addresses`

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I have got a problem with two tables:

 CREATE TABLE IF NOT EXISTS `addresses` (    `adr_id` int(11) NOT NULL auto_increment,    `per_id` int(11) NOT NULL,    `adr_street` varchar(50) NOT NULL,    `adr_houseno` int(11) default NULL,    `adr_housenoadd` varchar(10) default NULL,    `adr_postalcode` varchar(25) NOT NULL,    `adr_city` varchar(20) NOT NULL,    `adr_type` varchar(45) default NULL,    `cnt_id` int(11) NOT NULL,    `adr_date` date default NULL,    `sys-mut-dt` timestamp NULL default NULL,    `sys-mut-user` varchar(20) default NULL,    `sys-mut-id` int(11) NOT NULL default '0',    PRIMARY KEY  (`adr_id`),    KEY `per_id` (`per_id`),    KEY `cnt_id` (`cnt_id`)  ) ENGINE=InnoDB DEFAULT CHARSET=utf8 ;  --  -- RELATIES VOOR TABEL `addresses`:  --   `cnt_id`  --       `countries` -> `cnt_id`  --   `per_id`  --       `persons` -> `per_id`  --   CREATE TABLE `events` (    `evt_id` int(11) NOT NULL auto_increment,    `evt_name` varchar(50) NOT NULL,    `evt_description` varchar(100) default NULL,    `evt_startdate` date NOT NULL,    `evt_enddate` date default NULL,    `evt_starttime` time default NULL,    `evt_endtime` time default NULL,    `evt_amtpersons` int(11) default NULL,    `sts_id` int(11) NOT NULL,    `adr_id` int(11) default NULL,    `evt_amtPersonsSubs` tinyint(4) NOT NULL default '0',    `evt_photo` varchar(50) default NULL,    `sys-mut-dt` timestamp NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,    `sys-mut-user` varchar(20) default NULL,    `sys-mut-id` int(11) NOT NULL default '0',    PRIMARY KEY  (`evt_id`),    KEY `sts_id` (`sts_id`),    KEY `adr_id` (`adr_id`)  ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

The problem is, when i try to delete a record from address table I get the following error

DELETE FROM    addresses WHERE   per_id = 45  1451 - Cannot delete or update a parent row: a foreign key constraint fails (`site/events`, CONSTRAINT `adr_id` FOREIGN KEY (`adr_id`) REFERENCES `addresses` (`adr_id`) ON DELETE NO ACTION ON UPDATE NO ACTION) ;

The weird thing is that there is no record with the same per_id or adr_id in the events table.

So what’s going on over here?

How Can I solve this? 😉

/* I think it means 'How can I solve this?' */
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1 Answer

  1. It may sound stupid, but are you absolutely sure there are no child rows?

    Could you please run this:

    SELECT  e.* FROM    addresses a JOIN    events e ON      e.adr_id = a.adr_id WHERE   a.per_id = 45
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