* 案例:给某一列添加unique drop table if exists t_user; create table t_user( id int, username varchar(255) unique // 列级约束 ); insert into t_user values(1,'zhangsan'); insert into t_user values(2,'zhangsan'); ERROR 1062 (23000): Duplicate entry 'zhangsan' for key 'username' i...
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_...
"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...
2. mysql--ERROR 1452 (23000): Cannot add or update a child row: a foreign key constrai(2) 3. python--numpy生成正态分布数据及randint randn normal的使用(2) 4. Django框架获取各种form表单数据(2) 5. mac--解决安装wget报错的问题(1) mysql...
如果您尝试插入一行,其中的外键约束不满足,将得到1452错误码: AI检测代码解析 INSERTINTOorders(user_id)VALUES(999);-- 假设999在 users 表中不存在 1. 您将看到如下错误: AI检测代码解析 # ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails ...
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_VAR_SHADOW) 消息:必须用`...`引用变量,或重新命名变量。 错误:1454 SQLSTATE: HY000 (ER_PARTITION_REQUIRES_VALUES_ERROR) 消息:对于每个分区,%s PARTITIONING需要...
· 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_VAR_SHADOW) 消息:必须用`...`引用变量,或重新命名变量。 · 错误:1454 SQLSTATE: HY000 (ER_PARTITION_REQUIRES_VALUES_ERROR) 消息:对于每个分区...
• Error number: 1020; Symbol: ER_CHECKREAD; SQLSTATE: HY000 Message: Record has changed since last read in table '%s' • Error number: 1022; Symbol: ER_DUP_KEY; SQLSTATE: 23000 Message: Can't write; duplicate key in table '%s' • Error number: 1024; Symbol: ER_ERROR_ON_REA...
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 ...
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`)) Peter, may I ask, did you run execute it from the comm...