事实表可以根据一或多个外键过滤。
The fact tables can be filtered on one or more of their foreign keys.
为简单起见，该图不含显式的外键。
For the sake of simplicity, it contains no explicit foreign keys.
这使得我们几乎不可能创建外键。
This makes it virtually impossible for us to create a foreign key.
它类似于关系数据库中的外键。
创建一个索引禁用的外键约束。
添加或删除惟一、独特或外键约束。
Adding or dropping unique, distinct, or foreign key constraints.
您无需担心处理主键或外键的麻烦。
You don't need to worry about messing around with the primary key or foreign key.
创建了表、主键、外键，和索引。
Created the tables, primary keys, foreign keys, and indexes.
允许您定义表的主键、惟一键和外键。
The keys view allows you to define primary, unique, and foreign keys for the table.
对于所有主键和外键的规范。
我们还知道如何在模式文件中表示外键。
We've also seen how foreign keys are represented in the Schema files.
因此为了简化起见，本文没有使用外键。
So to make things simpler for this article, no foreign keys are used.
您为维度所选择的键必须是事实的外键。
The keys you choose for the dimensions must be the foreign keys of the fact.
将关系映射到数据库外键。
用于发现外键的跨列分析。
丢失连接谓词，只在定义了外键的情况下。
Missing join predicates, but only if a foreign key is defined.
非标识可选的外键关系。
非标识一对一外键关系。
为基于主键、外键和索引的通用查询提供访问
Provides access to common queries based on primary keys, foreign keys, and indexes.
关系数据库中的关系是通过使用外键来维护的。
Relationships in relational databases are maintained through the use of foreign keys.
这样使得在关系数据库模型中导入外键更方便。
This makes importing foreign keys easier in relational database models.
为此需要使用外键。
一列使用一个外键链接到表单上(表中的一行)。
One column links to the form (the row in the table) using a foreign key.
所有DOC_ID都是惟一的，以满足外键约束。
通过向导还可以添加更多的列、主键和外键等等。
You can add more columns, primary and foreign keys, and more with the wizard.
们了解有关普通表单和外键以及SQL的所有内容。
在包中显示事实表的外键。
您还可以在次表中建立外键，以链接主表中的主键。
You can also establish a foreign key in a secondary table to link with a primary key in a primary table.
约束支持主键、外键、惟一和非空约束。
Constraints Supports, primary, foreign, unique, not null constraint.
然而，不管是父表还是子表，目前还不支持复制外键。
However, it does not currently support copying of foreign keys, either parent or child.
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