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ORA-02428: could not add foreign key reference ORACLE 报错 故障修复 远程处理

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ORA-02428: could not add foreign key reference ORACLE 报错 故障修复 远程处理

文档解释

ORA-02428: could not add foreign key reference

Cause: could not add a foreign key reference because of error in declaration. Either referenced table does not exist or table does not have an unique key.

Action: make sure referenced table exists and/or has unique key

ORA-02428是Oracle数据库管理系统出现错误的消息代码之一,它表示不能加入外键引用。

官方解释

常见案例

1. 在对两个表建立外键时,由于不满足外键完整性约束,例如不存在主表中可以和子表中相关联的外键值,所以就会产生此错误。

2. 子表定义的列数和主表定义的外键列数不一致时,也会出现这样的错误。

3. 错误的数据类型也可能导致此错误。

正常处理方法及步骤

1.检查数据类型:检查外键列的数据类型,看看它是否与主表的主键列的数据类型相同。

2.添加外键值:确保主表中存在可以与子表中的外键列相关联的所有值。

3.检查外键列数量:确保两个表中定义的列数相同。

4.检查锁定模式:请确保主表上存在一个可用的行,以便可以添加外键引用。

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ORA-02428: could not add foreign key reference ORACLE 报错 故障修复 远程处理

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