最近在做新生入学系统,学生表中包括新生的班级,专业等信息,班级,专业就需要和班级表,专业表进行关联,但是在添加外键的过程中却出现了“Cannot add foreign key constraint”...delete or update a parent row: a foreign key constraint fails”,于是尝试将freshstudententities表的引擎修改为ndbcluster...“1217 – Cannot delete or update a parent row: a foreign key constraint fails“,这可能是MySQL在引擎中设置了foreign...key关联,造成无法更新或删除数据。...可以通过设置FOREIGN_KEY_CHECKS变量来避免这种情况: SET FOREIGN_KEY_CHECKS = 0; 删除完成后设置 :SET FOREIGN_KEY_CHECKS = 1;
最近在做新生入学系统,学生表中包括新生的班级,专业等信息,班级,专业就需要和班级表,专业表进行关联,但是在添加外键的过程中却出现了“Cannot add foreign key constraint...delete or update a parent row: a foreign key constraint fails",于是尝试将freshstudententities表的引擎修改为ndbcluster..."1217 - Cannot delete or update a parent row: a foreign key constraint fails",这可能是MySQL在引擎中设置了foreign...key关联,造成无法更新或删除数据。...可以通过设置FOREIGN_KEY_CHECKS变量来避免这种情况: SET FOREIGN_KEY_CHECKS = 0; 删除完成后设置 :SET FOREIGN_KEY_CHECKS = 1;
新增外键时报错: 错误代码: 1215 Cannot add foreign key constraint 表key_list: CREATE TABLE key_list ( server_app_id...ADD CONSTRAINT server_app_id_ibfk FOREIGN KEY (server_app_id) REFERENCES for_list (for_id); 执行正常 在表key_list...中新增外键server_name_id_ibfk: ALTER TABLE key_list ADD CONSTRAINT server_name_id_ibfk FOREIGN KEY (server_name...错误代码: 1215 Cannot add foreign key constraint 原因: 在新增外键时,关联表(for_list)中的相关字段(for_name)必须为index 解决: for_list...ADD CONSTRAINT server_name_id_ibfk FOREIGN KEY (server_name) REFERENCES for_list (for_name); 发现操作成功:
varchar(20) DEFAULT NULL, `count` int(11) NOT NULL DEFAULT '0', `sid` int(11) NOT NULL, PRIMARY KEY...(`id`), UNIQUE KEY `id_index` (`id`) USING HASH, UNIQUE KEY `sid_index` (`sid`) USING HASH ) ENGINE...(`id`), UNIQUE KEY `id_index_1` (`id`) USING HASH ) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET...碰到错误 在创建外键之时,使用的SQL和碰到错误信息如下: alter table `product' add CONSTRAINT `sid_ref` FOREIGN KEY (`sid`)...总结 之所以出现1215的问题,是由于主外键之间的数据类型不一致造成的,以后类似问题,皆可按此处理。
今天用Hibernate建立外键的时候发现没有建立 但是创建了这个字段 情景: user表有一字段role,role是role表id字段的外键 原因...
本文为作者翻译文章,原文链接:Dealing with MySQL Error Code 1215: “Cannot add foreign key constraint” 在给一个表创建外键时,MySQL...总是会出现提示: ERROR 1215 (HY000): Cannot add foreign key constraint 这信息基本是啥都没说,下面就来说说几种常见的导致1215错误的情况: 父表不存在...KEY (parent_id) REFERENCES `parent`(`id`) -> ) ENGINE INNODB; ERROR 1215 (HY000): Cannot add foreign...FOREIGN KEY (uid) REFERENCES `user`(`id`) ON DELETE cascade ON UPDATE cascade; ERROR 1215 (HY000): Cannot...KEY ERROR ------------------------ 2017-06-14 21:33:55 7f6fabab7700 Error in foreign key constraint
创建语法 [CONSTRAINT [symbol]] FOREIGN KEY [index_name] (index_col_name, ...)...1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (`test`....1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (`test`....DELETE set default ON UPDATE set default; ERROR 1215 (HY000): Cannot add foreign key constraint 结论:...set null ON UPDATE set null; ERROR 1215 (HY000): Cannot add foreign key constraint 结论:Innodb存储引擎暂不支持
3、两表主键ID一定要类型、长度保持一致,不然会报 "ERROR 1215 (HY000): Cannot add foreign key constraint" 错误。
格式 ALTER TABLE 从表名 ADD [CONSTRAINT 约束名] FOREIGN KEY (从表的字段) REFERENCES 主表名(被引用 字段) [on update xx][on...key (deptid) references dept(did) ); //ERROR 1215 (HY000): Cannot add foreign key constraint 原因是...) references dept(did) ); //ERROR 1215 (HY000): Cannot add foreign key constraint 原因: 从表的deptid字段和主表的...1452 (23000): Cannot add(添加) or update(修改) a child row: a foreign key constraint fails (`atguigudb...1452 (23000): Cannot add(添加) or update(修改) a child row(子表的记录): a foreign key constraint fails(外键约束失败
(`id`), INDEX `FK_staff_has_role_staff` (`staff_id`), CONSTRAINT `FK_staff_has_role_staff` FOREIGN...KEY (`staff_id`) REFERENCES `staff` (`id`) ON UPDATE CASCADE ON DELETE CASCADE ) COLLATE='utf8_general_ci...`sn` VARCHAR(10) NOT NULL COMMENT '序列号', `price` FLOAT NOT NULL COMMENT '价格', `amount` SMALLINT(6)...` FOREIGN KEY (`staff_id`) REFERENCES `staff` (`id`) ) COMMENT='产品表' COLLATE='utf8_general_ci' ENGINE...'45000' SET MESSAGE_TEXT = "The staff's role cannot update data
; signal sqlstate 'HY000' set message_text=msg; end if; end; $$ delimiter ; delimiter解释:其实就是告诉...(`ID`), KEY `dept_name` (`dept_name`), CONSTRAINT `instructor_ibfk_1` FOREIGN KEY (`dept_name`)...(2)删除外键 alter table instructor drop foreign key fk_dept_name; (3)添加外键 alter table instructor add constraint...1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`ddl`....如下所示: ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (`ddl`
· 错误:1215 SQLSTATE: HY000 (ER_CANNOT_ADD_FOREIGN) 消息:无法添加外键约束。...· 错误:1396 SQLSTATE: HY000 (ER_CANNOT_USER) 消息:对于%s的操作%s失败。...· 错误:1463 SQLSTATE: HY000 (ER_LIST_OF_FIELDS_ONLY_IN_HASH_ERROR) 消息:仅在KEY分区中允许使用字段列表。...· 错误:1485 SQLSTATE: HY000 (ER_ADD_PARTITION_SUBPART_ERROR) 消息:试图用错误的子分区数增加分区。...· 错误:1486 SQLSTATE: HY000 (ER_ADD_PARTITION_NO_NEW_PARTITION) 消息:必须至少添加1个分区。
错误:1396 SQLSTATE: HY000 (ER_CANNOT_USER) 消息:对于%s的操作%s失败。...错误:1463 SQLSTATE: HY000 (ER_LIST_OF_FIELDS_ONLY_IN_HASH_ERROR) 消息:仅在KEY分区中允许使用字段列表。...错误:1474 SQLSTATE: HY000 (ER_SUBPARTITION_ERROR) 消息:对于子分区,仅能将RANGE/LIST分区与HASH/KEY分区混合起来。...错误:1485 SQLSTATE: HY000 (ER_ADD_PARTITION_SUBPART_ERROR) 消息:试图用错误的子分区数增加分区。...错误:1486 SQLSTATE: HY000 (ER_ADD_PARTITION_NO_NEW_PARTITION) 消息:必须至少添加1个分区。
:主键,指定该列的值可以唯一地标识该列记录 # FOREIGN KEY :外键,指定该行记录从属于主表中的一条记录,主要用于参照完整性 返回顶部 NOT NULL 是否可空,null表示空,非字符串...mysql> insert into t12 values (null); ERROR 1048 (23000): Column 'id' cannot be null mysql> insert into...key(dep_id) references departments(dep_id)); ERROR 1215 (HY000): Cannot add foreign key # 设置dep_id...key(dep_id) references departments(dep_id)); ERROR 1215 (HY000): Cannot add foreign key constraint..., name varchar(20) not null, dpt_id int, foreign key(dpt_id) references department(id) on delete cascade
dept(did) ); #ERROR 1215 (HY000): Cannot add foreign key constraint 原因是dept的did不是键列 (2)失败:数据类型不一致 create...) references dept(did) ); #ERROR 1215 (HY000): Cannot add foreign key constraint 原因是从表的deptid字段和主表的did...1452 (23000): Cannot add(添加) or update(修改) a child row: a foreign key constraint fails (`atguigudb`....1452 (23000): Cannot add(添加) or update(修改) a child row(子表的记录): a foreign key constraint fails(外键约束失败...Cannot delete(删除) or update(修改) a parent row(父表的记录): a foreign key constraint fails (`atguigudb`.
Caused by: java.sql.SQLException: Cannot add foreign key constraint 查看DATABASECHANGELOG 日志 使用h2数据库时...手动执行添加外键也无法成功 手动执行sql语句 ALTER TABLE datasync_monitor.table_monitor_strategy ADD CONSTRAINT fk_account_table...FOREIGN KEY (account_monitor_strategy_id) REFERENCES datasync_monitor.account_monitor_strategy (id)...报错 错误代码: 1215 Cannot add foreign key constraint 既然liquibase能够在h2上成功创建表以及外键,但是在mysql上创建不了,而且表存在手动也不能添加外键
alter table emp add foreign key (deptid) references dept(did); 6. 6 演示问题 ( 1 )失败:不是键列 create table dept...(5), #员工姓名 deptid int, #员工所在的部门 foreign key (deptid) references dept(did) ); #ERROR 1215 (HY000): Cannot...deptid char, #员工所在的部门 foreign key (deptid) references dept(did) ); #ERROR 1215 (HY000): Cannot add foreign...1452 ( 23000 ): Cannot add(添加) or update(修改) a child row: a foreign key constraint fails (`atguigudb...1452 (23000): Cannot add(添加) or update(修改) a child row(子表的记录): a foreign key constraint fails(外键约束失败
(`city_id`), KEY `country_id` (`country_id`), CONSTRAINT `city_ibfk_1` FOREIGN KEY (`country_id...1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (`test/city`, CONSTRAINT...) | ADD [CONSTRAINT [symbol]] PRIMARY KEY [index_type] (index_col_name,......写了后又是一大堆的错误,无从下手啊 代码如下: mysql> alter table city add CONSTRAINT `city_ibfk_1` FOREIGN KEY (`country_id...`) REFERENCES `country` (`country_id`) ON UPDATE CASCADE; ERROR 1005 (HY000): Can't create table '.
{ "not_null_violation", ERRCODE_NOT_NULL_VIOLATION }, { "foreign_key_violation", ERRCODE_FOREIGN_KEY_VIOLATION...{ "invalid_recursion", ERRCODE_INVALID_RECURSION }, { "invalid_foreign_key", ERRCODE_INVALID_FOREIGN_KEY...23 - Integrity Constraint Violation */ #define ERRCODE_INTEGRITY_CONSTRAINT_VIOLATION MAKE_SQLSTATE('...MAKE_SQLSTATE('2','3','5','0','2') #define ERRCODE_FOREIGN_KEY_VIOLATION MAKE_SQLSTATE('2','3','5','...MAKE_SQLSTATE('4','2','P','1','9') #define ERRCODE_INVALID_FOREIGN_KEY MAKE_SQLSTATE('4','2','8','3'