Mysql外键约束的创建与删除的使用
本文主要介绍了Mysql外键约束的创建与删除的使用,文中通过示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
禁用、启用外键约束和触发器
参考资料:http://huangqiqing123.iteye.com/blog/1420465 【一、SQL命令】--- 禁用指定表所有外键约束 alter table [表名] NOCHECK constraint all --- 启用指定表所有外键约束 alter table [表名] C...
Laravel Softdelete具有外键和限制约束?
I was wondering how to use Laravels softdelete with something like MySql foreign key restrict constraints. 我想知道如何使用Laravels softdelete与MySql外键限制约束。 Is...
MySQL:错误1215 (HY000):不能添加外键约束。
I have read Database system concepts, 6th edition, Silberschatz. I'm going to implement the university database system shown in chapter 2 on OS X on M...
错误:SQLSTATE [HY000]:常规错误:1215无法在Phalcon中添加外键约束
I'm trying to run a migration with Phalcon (Devtools 2.0.10) but it keeps complaining about ERROR: SQLSTATE[HY000]: General error: 1215 Cannot add for...
外键约束错误在执行新安装的Piranha CMS时。
Piranha CMS is a programmer oriented CMS (I prefer to write it since I've been downvoted last time!). I've spent all the afternoon trying to fix this ...
使用异常处理来修复PL / pgsql中的外键约束(PostgreSQL)
Trying to learn exception handling in pgSQL (PostgreSQL 9.1). The following SP fails with 试图学习pgSQL中的异常处理(PostgreSQL 9.1)。以下SP失败 ERROR: insert or upda...
使用复合主键在Junction表上设置外键约束
I have a junction table that stores the relationship between tests and the questions in the tests, with testFK and questionFK set as a compound primar...
MySQL外键约束的实例讲解
这篇文章主要介绍了MySQL外键约束的实例讲解,帮助大家更好的重温MySQL 外键约束的相关知识,感兴趣的朋友可以了解下
MySQL 外键约束和表关系相关总结
一个项目中如果将所有的数据都存放在一张表中是不合理的,比如一个员工信息,公司只有2个部门,但是员工有1亿人,就意味着员工信息这张表中的部门字段的值需要重复存储,极大的浪费资源,因此可以定义一个部门表和员工信
MySQL 关闭子表的外键约束检察方法
下面小编就为大家带来一篇MySQL 关闭子表的外键约束检察方法。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧
MySQL外键约束的禁用与启用命令
下面小编就为大家带来一篇MySQL外键约束的禁用与启用命令。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧
错误1215,无法添加外键约束
I know there are numerous questions regarding this error on here but I've searched through many and none seem to explain it in my case! I've created a...
MySQL错误1215:不能添加外键约束。
I am trying to forward engineer my new schema onto my db server, but I can't figure out why I am getting this error. I've tried to search for the answ...
无法添加外键约束,(#1215 - 无法添加外键约束)
I'm trying to create a database, i have one table in my database and want to add the other one. 我正在尝试创建一个数据库,我的数据库中有一个表,并希望添加另一个表。 The table i have: ...
错误代码:1215无法添加外键约束
I'm trying to create a health management DB, I get this error. What is the problem? 我正在尝试创建一个健康管理数据库,我收到此错误。问题是什么? -- table glocationCREATE TABLE `MOH...
无法添加外键约束错误1215 phpmyadmin
Currently working with a database in phpmyadmin and I'm trying to set up a foreign key constraint. Parent Table: 目前正在使用phpmyadmin中的数据库,我正在尝试设置外键约束。父表:...
Mysql错误:1215无法添加外键约束
Referenced table is 'group' (InnoDB). 引用表是'group'(InnoDB)。 It has a 'id' column defined as INT(11), not nullable, auto increment, primary key 它有一个'id'...
错误代码1215:无法添加外键约束MySQL
I'm having a problem creating a database in MySQL. The error code:'Error code 1215: cannot add foreign key constraint' pops up when i try to implement...
错误代码1215:无法添加外键约束
I am trying to add a foreign key constraint, but it fails. I did that many times before and I can not determine why it is doing that. Basically, I wan...