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 ...
错误:1289 SQLSTATE: HY000 (ER_FEATURE_DISABLED) 消息:’%s’特性已被禁止,要想使其工作,需要用’%s’创建MySQL。 [Page] 错误:1290 SQLSTATE: HY000 (ER_OPTION_PREVENTS_STATEMENT消息:MySQL正使用%s选项运行,因此不能执行该语句。 错误:1291 SQLS...
3. from the cmd line execute "mysql constraint_test < constraint_test.sql" As you'll see, the foreign key constraint error we consistently receive is similar to: "ERROR 1452 (23000) at line 55: Cannot add or update a child row: a foreign key constraint fails (`constraint_test`.`be...
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这是因为表设置了外键约束,而你试图插入一条外键字段所在表纪录不存在的一个值.就会报1452错.比如a,b两表,a表外键id值来自b表的ID,当你在a表中插入一条纪录时,id字段用了不在b表id值范围内的值,就会报此错.
MySQL添加外键失败ERROR 1452的解决 出现: ERROR 1452 : Cannot add or update a child row: a foreign key constraint fails 最后才发现,原来是我的order_items表中已经存在了数据(这才是重点),且orderid这个属性和orders中的不对应,因此如果添加外键,就会导致错误 ...
mysql> insert into pc values('1'); Query OK, 1 row affected (0.01 mysql> insert into pc values('5'); ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`Orange/pc`, CONSTRAINT `pc_ibfk_1` FOREIGN KEY ...
mysql> insert into pc values('5'); ERROR1452(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 ...
Re: PLS HELP: ERROR 1452 (23000) Foreign Key Constraint Roland Chan April 06, 2011 01:34PM Re: PLS HELP: ERROR 1452 (23000) Foreign Key Constraint Roland Chan April 06, 2011 01:37PM Re: PLS HELP: ERROR 1452 (23000) Foreign Key Constraint ...
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 ...