[SQL] Query dailyfresh start [ERR] 1452 - Cannot add or update a child row: a foreign key constraint...fails (dailyfresh.df_goods_sku, CONSTRAINT df_goods_sku_type_id_576de3b4_fk_df_goods_type_id FOREIGN...KEY (type_id) REFERENCES df_goods_type (id)) 错误原因:插入语句 插入顺序紊乱。
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...
添加的外键列与另一个表的唯一索引列(一般是主键)的数据类型不同 原因二: 要添加外键的表类型与另一个表的存储引擎是不是都为innodb引擎 #查看表引擎 ...
“ you're adding a foreign key, you need to make sure that the data in the child table already exists...in the parent table . ” 参考:https://www.experts-exchange.com/questions/28238845/1452-Cannot-add-or-update-a-child-row-a-foreign-key-constraint-fails.html
现象 MySQL在删除一张表时出现 ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint...fails 原因 可能是在Mysql中,删除的表和另一张表设置了foreign key的关联,造成无法更新或删除数据; 解决方案 可以通过设置FOREIGN_KEY_CHECKS变量来避免这种情况。...禁用外键约束 SET FOREIGN_KEY_CHECKS = 0; 然后就可以删除表了 删除完成后再启动外键约束 SET FOREIGN_KEY_CHECKS = 1; 查看当前FOREIGN_KEY_CHECKS...的值可用如下命令 SELECT @@FOREIGN_KEY_CHECKS; 注意 这样设置只会影响当前会话, 不会影响全局 若想设置全局变量的话,可以这样写 SET GLOBAL FOREIGN_KEY_CHECKS
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:
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
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`)...REFERENCES `sealer` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION 碰到的错误信息如下: 无法正确的插入外键约束。
affected (0.00 sec) mysql> insert into t2 values(11,11); ERROR 1452 (23000): Cannot add or update a...child row: a foreign key constraint fails (`test`....`t2`: , CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id2`) REFERENCES `t1` (`id`) Trying to add in child table...add or update a child row: a foreign key constraint fails (`test`....`t2`: , CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id2`) REFERENCES `t1` (`id`) Trying to add in child table
mysql中foreign key的使用注意 1、用于约束表中的字段,必须是另一个表中某个字段所存在的值。 2、在另一个表中,这个列不一定是主键,但必须是唯一性索引,否则会创建失败。...实例 mysql> create table orders (id int(11) primary key ,userId int(11) , FOREIGN KEY (userId) REFERENCES... (23000): Cannot add or update a child row: a foreign key constraint fails (`t`....`orders`, CONSTRAINT `orders_ibfk_1` FOREIGN KEY (`userId`) REFERENCES `user` (`id`)) mysql> insert... orders values(1,1); Query OK, 1 row affected (0.01 sec) 以上就是mysql中foreign key的使用注意,希望对大家有所帮助。
FROM `category` WHERE id=1,会报错: #1451 - Cannot delete or update a parent row: a foreign key constraint...`article`, CONSTRAINT `fk_1` FOREIGN KEY (`category_id`) REFERENCES `category` (`id`)) (3)从表article中,...添加不存在的category_id:insert into article(category_id,name) values(2,'分类2') 会报错: #1452 - Cannot add or update...a child row: a foreign key constraint fails (`test`....代码如下 复制代码 --删除外键 ALTER TABLE article DROP FOREIGN KEY fk_1 --添加外键 ALTER TABLE `article` ADD CONSTRAINT
当插入的数据违反了这个规则,就会产生ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails...否则,会产生ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (student_course.course..., CONSTRAINT course_ibfk_1 FOREIGN KEY (Cpno) REFERENCES course (Cno))错误。.../*取消外码约束*/ set foreign_key_checks = 0; /*删除或更新数据*/ delete/update from 表名 where 条件; /*恢复外码约束*/ set foreign_key_checks...SC add foreign key(Cno) references Course(Cno); 向表中插入数据。
key (deptid) references dept(did) ); //ERROR 1215 (HY000): Cannot add foreign key constraint 原因是...(23000): Cannot add(添加) or update(修改) a child row: a foreign key constraint fails (`atguigudb`....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) (`atguigudb`....(23000): Cannot delete(删除) or update(修改) a parent row(父表的记 录): a foreign key constraint fails (`atguigudb...a foreign key constraint fails (`atguigudb`.
限制访问频率 Django REST framework foreignkey 序列化 Django admin Foreignkey ManyToMany list_display展示 django 1452..., ‘Cannot add or update a child row: a foreign key constraint fails django 主动抛出 403 异常 再谈《Django 限制访问频率
操作django的admin,添加用户时报错: 1452, 'Cannot add or update a child row: a foreign key constraint fails (`mxonline...`django_admin_log`, CONSTRAINT `django_admin_log_user_id_c564eba6_fk_auth_user_id` FOREIGN KEY (`user_id..."HOST": "127.0.0.1", #解决admin的外键报错 "OPTIONS": { "init_command": "SET foreign_key_checks
环境配置 从com.alibaba.wxlib.exception.WXRuntimeException: should call prepareTargetKey first 说起 django 1452..., ‘Cannot add or update a child row: a foreign key constraint fails Instant Demo 7.50.38 屏幕录像工具 基于DFA
rms.go_datetime’ in ‘field list'”) Lanhelper 1.93 【Cracked】破解版 ubuntu uwsgi No module named ‘django’ django 1452..., ‘Cannot add or update a child row: a foreign key constraint fails 如何绕过微信图片的防盗链 ngix+uwsgi+django
(`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...(ID), CONSTRAINT fk_dept_name FOREIGN KEY (dept_name) REFERENCES department (dept_name) ON UPDATE...(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`
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