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The following mainly brings you to master simple ways to operate mysql foreign keys. I hope these contents can bring you practical use, which is also the main purpose of this article for my editor to master simple ways to operate mysql foreign keys. All right, don't talk too much nonsense, let's just read the following.

1. Create a foreign key to associate two tables

Create table score (id int not null auto_increment, subject char (32) not null, stu_id int not null, primary key (id), key fk_stu_key (stu_id))

Constraint fk_stu_key foreign key (stu_id) references student (stu_id))

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