-> ) ENGINE INNODB; ERROR 1215 (HY000): Cannot add foreign key constraint # We check for the parent table and is not there. mysql> SHOW TABLES LIKE 'par%'; Empty set (0.00 sec) # We go ahead and create the parent table (we’ll use the same parent table structure for ...
当你在创建或修改数据库表时遇到错误代码 1215: Cannot add foreign key constraint,这通常意味着你尝试添加的外键约束不满足数据库的要求。根据提供的提示,我们可以从以下几个方面来排查和解决这个问题: 检查数据表引擎是否支持外键约束: 在MySQL中,不是所有的存储引擎都支持外键约束。InnoDB存储引擎支持外键,而MyISA...
mysql错误之errorcode 1215问题 1.此类问题出现时我们往往会迫不及待的去百度,但是问题偶尔也不是我们想的那样,比如我本次犯下的错误如下: 上图是我给表添加外键约束的时候的sql。下图是我建的表,问题出哪里了?原来是我的数据库根本没有order表,我建的表名字叫Orders,我去,那为什么不给我报数据库没有该表的...
MySQL ERROR 1215 (HY000)的一个情况 create table pcourse( cno char(9), cpno char(9), primary key(cno,cpno), foreign key(cno) references course(cno), foreign key(cpno) references course(cno) ); ERROR 1215 (HY000): Cannot add foreign key constraint 西电数据库上机作业。这个外键就是添不上...
mysql中，两个表要建外键必须都是InnoDB表，MyISAM表暂时不支持外键，估计就是引擎的问题 create
mysql外键:error:1215 - Cannot add foreign key constraint,Mysqlforeignkey不能添加常见原因: 个人原创转载注明出
Re: Error Code: 1215: Cannot add foreign key constraint Peter Brawley December 26, 2016 11:28PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and doe...
[myschema.e_daily] Unknown database 'mydb' Example server-side error message sent to client programs, as displayed by the mysql client: mysql> SELECT * FROM no_such_table; ERROR 1146 (42S02): Table 'test.no_such_table' doesn't exist Each server error message includes an error code, ...
MariaDB shares error codes with MySQL, as well as adding a number of new error codes specific to MariaDB. An example of an error code is as follows: SELECT * FROM x; ERROR 1046 (3D000): No database selected Contents Shared MariaDB/MySQL error codes MariaDB-specific error codes ...
</code> 外键是,article.category_id 关联 category.id ; 出错的原因在于2个字段的int的类型不同,article.category_id 有 unsigned 属性,而 category.id 没有这个属性。 最终category表的结构如下: <code> CREATE TABLEcategory( idint(11)unsignedNOT NULL AUTO_INCREMENT, ...