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This article shows you how to solve the error report when creating foreign keys in MySQL. The content is concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Mysql > create table orders2 (id int auto_increment primary key, customer_id int, description varchar (50), constraint fk_orders foreign key (customer_id) references customer (id))

ERROR 1105 (HY000): Can't write; duplicate key in table 'orders2'

Reason for reporting an error:

Foreign key name already exists. Change a foreign key name.

Mysql > create table orders2 (id int auto_increment primary key, customer_id int, description varchar (50), constraint fk_orders2 foreign key (customer_id) references customer2 (id))

Query OK, 0 rows affected (0.22 sec)

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