Definition: a relationship exists between two database tables when one table has a foreign key that references the primary key of another table.

定义：当两个表中，一个表的外键和另一个表的主键存在一种关联关系，我们把这种关系称为数据库关系。

You can click any table that this table references by a foreign key.

可以单击此表中的外键所引用的任何表。

You can use this method on tables that have a foreign key that references another table.

对于具有引用另一个表的外键的表，可以使用此方法。

The findings will function as references for cultural teaching reform in foreign languages teaching in key science and engineering universities.

研究结果将为重点理工科院校外语教学中的文化教学改革提供参考。