解释错误码1452 (23000)的含义 错误码1452 (23000) 是一个 SQL 错误,特别是在使用具有外键约束的数据库时常见。它表明在尝试添加或更新一个子表(即包含外键的表)中的行时,由于违反了外键约束条件,操作无法完成。具体来说,这个错误通常是因为子表中试图插入或更新的外键值在父表中不存在。 列出可能导致该错误出...
ERROR1452(23000): Cannot add or update a child row: a foreign key constraint fails (`course`.`teacher`, CONSTRAINT `for_teacher_1` FOREIGN KEY (`dept_id`) REFERENCES `dept` (`id`) ON DELETE SET NULL ON UPDATE SET NULL) 排错: mysql>show create table teacher;+---+---+ | Table ...
情景: user表有一字段role,role是role表id字段的外键 原因: user表中已经有记录了,而且有的记录role这个字段在role表没有对应的id,所以就不能创建外键 解决方案: 先手动修改user.role字段,修改成已经在role表中存在的id值
错误:1451 SQLSTATE: 23000 (ER_ROW_IS_REFERENCED_2) 消息:不能删除或更新父行,外键约束失败(%s)。 错误:1452 SQLSTATE: 23000 (ER_NO_REFERENCED_ROW_2) 消息:不能添加或更新子行,外键约束失败(%s)。 错误:1453 SQLSTATE: 42000 (ER_SP_BAD_...
原因: user表中已经有记录了,而且有的记录role这个字段在role表没有对应的id,所以就不能创建外键 解决方案: 先手动修改user.role字段,修改成已经在role表中存在的id值 $(function () { $('pre.prettyprint code').each(function () { var lines = $(this).text().split('\n').length; var $numberi...
Chris Loftus May 17, 2011 01:16AM Re: mysqladmin shutdown and ERROR 1452 (23000): Cannot add or update a child row Chris Loftus May 19, 2011 08:06AM Sorry, you can't reply to this topic. It has been closed.
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`Orange/pc`, CONSTRAINT `pc_ibfk_1` FOREIGN KEY (`cpumodel`) REFERENCES `parts` (`cpu`)) 四、外键的删除 这个fk_pc就是表pc的外键,用来为删除外键定义用的,如下所示: ...
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"ERROR 1452 (23000) at line 55: Cannot add or update a child row: a foreign key constraint fails (`constraint_test`.`beneficiary`, CONSTRAINT `FK41BADEC55CE3480` FOREIGN KEY (`insured_id`) REFERENCES `Insured` (`insured_id`))" However, there is definitely an insured_id in the paren...
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`constraint_test`.`beneficiary`, CONSTRAINT `FK41BADEC55CE3480` FOREIGN KEY (`insured_id`) REFERENCES `Insured` (`insured_id`)) Subject Written By ...