错误代码 [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。 阐述导致该错误的可能原因 外键值错误:在子表中插...
SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails 异常原因:两张表存在外键关联并且有级联操作,级联更新或级联删除等 1.(此处为)设置的外键与另一个表中的唯一索引列(一般是主键)中的值不匹配 2.添加的外键列与另一个表的唯一索引列(一般是主键)的数...
错误代码 java.sql.SQLException: Cannot add or update a child row: a foreign key constraint fails (book.t_order_item, CONSTRAINTt_order_item_ibfk_1FOREIGN KEY (order_id) REFERENCESt_order(order_id)) Query: insert into t_order_item(name,count,price,total_price,order_id)values(?,?,?,?,...
mysql数据库报错 sql 1452 Cannot add or update a child row:a foreign key constraint fails 其实这句话的意思就是你添加一个值是一个外键,但是这个外键不在关联的数据库中的主键中,这样就导致了添加失败了,解决办法就是添加对应关联数据库的主键的值,不过我要提醒一下!(也就是我采的坑!) 一定要看清有几...
(0.44 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> ALTER TABLE `UserRoleCompanie` ADD CONSTRAINT companie FOREIGN KEY (`companieId`) REFERENCES `Companie`(`id`); ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`nacho@prod`.`#sql-1_91c...
5.2.1. ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraintfails ('sakila'.'favorite_food', CONSTRAINT 'fk_fav_food_person_id' FOREIGNKEY('person_id') REFERENCES 'person' ('person_id'))5.2.2. 仅当使用InnoDB存储引擎创建数据表时，外键约束才是强制的 5.3....
-- Cannot add or update a child row: a foreign key constraint fails INSERT INTO employee (NAME, age, dept_id) VALUES ('小乔', 18, 6); -- 删除employee表的employee_ibfk_1外键 alter table employee drop foreign key employee_ibfk_1; ...
January 22, 2019 03:03PM Re: PDOException: SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row John Goutzamanis January 22, 2019 02:41PM Sorry, you can't reply to this topic. It has been closed....
报错:ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails 因为主表中不存在班级5。 再尝试删除班级表中的四班: DELETEFROMCLASSESWHEREclass_id=4; 报错:ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails ...
java.sql.SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails ... 问题: 无法为表插入一条包含外键的记录 出错原因: 一个表A将表B的id作为外键, 然后新生成了一个表C, 将其表名修改为B(原来的表B另改其名, 例如B'), 然后外键指向的还是表B',...