To accomplish this, you use foreign keys.
为此需要使用外键。
Foreign keys that do not have indexes defined.
外键未定义索引。
Expose Fact Table Foreign Keys in the package.
在包中显示事实表的外键。
Mapping relationships to database foreign keys.
将关系映射到数据库外键。
Specifications for all primary keys and foreign keys.
对于所有主键和外键的规范。
Showing all the foreign keys associated with a table.
显示与一个表相关联的所有外键。
Created the tables, primary keys, foreign keys, and indexes.
创建了表、主键、外键，和索引。
They know all about normal forms and foreign keys and SQL.
们了解有关普通表单和外键以及SQL的所有内容。
For the sake of simplicity, it contains no explicit foreign keys.
为简单起见，该图不含显式的外键。
Expose foreign keys found in fact tables to Transformer modelers.
给 Transformer建模师提供事实表中发现的外键。
We've also seen how foreign keys are represented in the Schema files.
我们还知道如何在模式文件中表示外键。
So to make things simpler for this article, no foreign keys are used.
因此为了简化起见，本文没有使用外键。
Foreign keys allow you to relate a row in one table with a row in another.
外键可以让您将一张表中的一行与另一张表中的一行相关起来。
The fact tables can be filtered on one or more of their foreign keys.
事实表可以根据一或多个外键过滤。
SQLObject lets you define relationships among tables as foreign keys.
SQLObject允许将表之间的关系定义为外键。
Keys view a "Allows defining primary keys, unique keys, and foreign keys."
keys视图—允许定义主键、惟一键和外键。
This makes importing foreign keys easier in relational database models.
这样使得在关系数据库模型中导入外键更方便。
The keys you choose for the dimensions must be the foreign keys of the fact.
您为维度所选择的键必须是事实的外键。
You can add more columns, primary and foreign keys, and more with the wizard.
通过向导还可以添加更多的列、主键和外键等等。
Provides access to common queries based on primary keys, foreign keys, and indexes.
为基于主键、外键和索引的通用查询提供访问
The keys view allows you to define primary, unique, and foreign keys for the table.
允许您定义表的主键、惟一键和外键。
In fact, DrySQL generates your associations automatically, foreign keys and all.
实际上，DrySQL会自动生成关联、外键和所有的东西。
In the foreign keys page (shown in Figure 3), add a new foreign key ord_cust_key.
在外键页面中(如图3所示)，增加一个新的外键ord_cust_key。
The keys view allows you to define primary, unique, and foreign keys for the table.
keys视图允许定义表的主键、惟一键和外键。
Relationships in relational databases are maintained through the use of foreign keys.
关系数据库中的关系是通过使用外键来维护的。
However, it does not currently support copying of foreign keys, either parent or child.
然而，不管是父表还是子表，目前还不支持复制外键。
The same is true of foreign keys, like the one specified in the belongs_to association above.
对外键来说也是同样的，就像上面那个定义了belongs_to关联一样。
Foreign keys within tables maintain the relationship between intra-group and inter-group tables.
表中的外键维护着组间以及组内表之间的管理。
The last step is to make sure that the foreign keys are correctly defined for the relationships.
最后一步是确保外键能为相互关系适当地定义。
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