foreign key column的意思|示意

Listing 5 adds a trail and a location to the database, managed with a foreign key pointing from the location_id column in trails to the id column in locations.

清单5向数据库添加了一条赛道和一个地点，由从trails中的location_id列指向locations中的id列的外键管理。

The column pdb_id is the foreign key that links atom coordinates to the corresponding PDBML document in the PDBXML table.

列pdb_id是一个外键，链接了原子坐标与pdbxml表中对应的PDBML文档。

The name attribute defines the foreign key on the table to which the Customer class is mapped, and the referenced column defines the primary key to which the table CustomerOrder is mapped.

名称属性在customer类映射到的表上定义外键，参考列定义Table CustomerOrder映射到的主键。

In addition to the id primary key, you've declared the customer_id column to be a foreign key referencing the customer table.

除了id主键以外，还声明了customer_id列作为引用客户表的外键。

Since dayTrader-plan.xml did not use the foreign-key-column-on-source element in this relationship, the foreign key should be on the OrderEJB.

因为在此关系中 dayTrader-plan.xml 没有使用 foreign-key-column-on-source 元素，所以外键应该在 OrderEJB 上。

The column attribute specifies the column in the mapping table for the owning class that is used as the foreign key to the target class.

colum n属性指定当前类的映射表与目标类用作外键的列。