... To Concurrency column【并发列】 To Foreign key column【外键列】 To configure relationships【配置关系】 ...
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One column links to the form (the row in the table) using a foreign key.
一列使用一个外键链接到表单上(表中的一行)。
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 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。
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