创建表并添加默认约束的示例代码 CREATETABLEemployees(idINTAUTO_INCREMENTPRIMARYKEY,nameVARCHAR(100)NOTNULL,statusENUM('active','inactive')DEFAULT'active'); 1. 2. 3. 4. 5. 解释:在这个示例中,我们创建了一个employees表,其中id是主键,name是员工的名字,类型为字符串,不允许为空。而status字段为枚举类型...
-> id INT(10) NOT NULL PRIMARY KEY, -> parent_id INT(10), -> FOREIGN KEY (parent_id) REFERENCES `parent`(`id`) -> ) 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%';...
mysql>altertableordersaddconstraintfk_ordersforeignkey(c_id)referencescustomers_info(c_num); ERROR1215(HY000): Cannotaddforeignkeyconstraint 首先想到可能类型不同,于是查看表结构 mysql>desccustomers_info;+---+---+---+---+---+---+|Field|Type|Null|Key|Default|Extra|+---+---+---+---+--...
( `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY, `user_id` integer NOT NULL UNIQUE, `key` varchar(255) NOT NULL, `created` datetime NOT NULL ); 0 row(s) affected Records: 0 Duplicates: 0 Warnings: 0 ALTER TABLE `tastypie_apikey` ADD CONSTRAINT `user_id_refs_id_56bfdb62` ...
Mysql错误1452 – Cannot add or update a child row: a foreign key constraint fails 原因及解决方法[通俗易懂] 大家好,又见面了,我是你们的朋友全栈君。 报错的原因大概分为三种: 原因一: 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...
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
Bug #79918 Cannot add foreign key constraint Submitted: 11 Jan 2016 16:52Modified: 18 Apr 2019 16:25 Reporter: Stefano Giacone Email Updates: Status: Duplicate Impact on me: None Category: MySQL Server: InnoDB storage engineSeverity: S1 (Critical) Version: 5.7.10OS: Any (Win7 and ...
Bug #11714 Non-sensical ALTER TABLE ADD CONSTRAINT allowed Submitted: 3 Jul 2005 23:35Modified: 6 Mar 2010 18:55 Reporter: Roland Bouman Email Updates: Status: Closed Impact on me: None Category: MySQL Server: ParserSeverity: S3 (Non-critical) Version: 5.0.7OS: Any Assigned to: Marc...
Active Directory User does not assign User logon name and User Principal Name AD LDS cannot ChangePassword, but it can SetPassword Add <?xml version="1.0" encoding="UTF-8" standalone="yes"?> to my xml response Add a Constraint to restrict a generic to numeric types Add a html c...
how can I see all the constraint applied on my database in mysql??? thanks Subject Views Written By Posted add constraint failed 8123 Mazen Alsibai March 12, 2007 04:19AM Sorry, you can't reply to this topic. It has been closed. ...