Php 令人困惑的mysql问题
我有两张桌子的问题:Php 令人困惑的mysql问题,php,mysql,mysql-error-1451,Php,Mysql,Mysql Error 1451,我有两张桌子的问题: 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,
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;
问题是,当我试图从地址表中删除一条记录时,我得到了以下错误
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) ;
奇怪的是,events表中没有具有相同peru-id或adr-id的记录
那么这里发生了什么
我怎样才能解决这个问题?;-)
这听起来可能很愚蠢,但你绝对确定没有子行吗 请运行以下命令:
SELECT e.*
FROM addresses a
JOIN events e
ON e.adr_id = a.adr_id
WHERE a.per_id = 45
这听起来可能很愚蠢,但你绝对确定没有子行吗 请运行以下命令:
SELECT e.*
FROM addresses a
JOIN events e
ON e.adr_id = a.adr_id
WHERE a.per_id = 45