foreign key
英 [ˈfɒrən kiː]
美 [ˈfɔːrən kiː]
外键
双语例句
- For foreign key creation, another table with a primary key with a compatible data type is required.
对于创建外键，则需要另外一个具有主键的表，且该主键具有兼容的数据类型。 - Indexes are defined on all primary and foreign key columns to support efficient joins between the12 tables.
全部主键和外键均定义了索引，来支持12个表之间有效的结合。 - Therefore, you need to map the foreign key attribute in Employee to the Department's primary key.
因此您需要将Employee的外部关键字属性，与Department的主关键字映射上。 - Creating a foreign key using the Foreign Key tool is also very easy.
通过ForeignKey工具创建一个外键也是非常容易的。 - This makes it virtually impossible for us to create a foreign key.
这使得我们几乎不可能创建外键。 - Ensure dependent tables in a referential integrity ( RI) relationship have indexes that exactly match the foreign key.
确保参照完整性（referentialintegrity，RI）关系中的依赖表拥有与外键匹配的索引。 - This category of overhead includes CHECK constraint verification and foreign key constraint ( referential integrity ( RI)) verification.
这一类的开销包括检查约束验证和外键约束（参照完整性（RI））验证。 - Missing join predicates, but only if a foreign key is defined.
丢失连接谓词，只在定义了外键的情况下。 - Each one-to-many association is buried as a foreign key in the table of the many class.
每个一对多的关联在表中多个类中充当外键。 - In the case of a one-to-one relation, your transformation creates a foreign key in each table
在一对一关联的情况下，你的转换在所有表中都建立了一个外键 - The belongs_to expresses the one-to-one foreign key relationship between the DOCUMENTS and USERS table.
belongsto表达了DOCUMENTS与USERS表之间一对一的外键关系。 - Above, a many-to-one relationship is defined across a foreign key that is also part of a primary key.
在上例中，跨外键（也是主键的一部分）定义了多对一关系。 - In the case of one-to-many relations, your transformation creates a foreign key in every "many" table
在一对多关联的情况下，你的转换在所有“many”表中建立了一个外键 - 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）。 - Minimize the triggers, CHECK and foreign key constraints, and generated columns for the table.
尽量减少表上的触发器、检查和外键约束以及生成的列。 - After the foreign key constraint with index disabled is dropped and recreated, the reversion completes successfully.
终止和重新创建索引禁用的外键之后，降级就成功完成了。 - You need a foreign key, and also a column that defines the type of the target class.
这时，您需要一个外键，还需要一个能定义目标类的类型的列。 - Our virtual foreign key is based on two columns from the TB_RIGHT table.
我们的虚拟外键基于TBRIGHT表的两个列。 - A foreign key attribute, is automatically created in PROJECT.
在PROJECT中会自动创建一个外键属性COMPCODE。 - The new foreign key value does not exist in the referenced table.
新外键值不存在于被引用的表中。 - Use to define a foreign key between two tables in your Object Relational diagram.
用于在对象关系图中定义两个表之间的外键。 - The logical model for a relational database normalizes the entities and relationships into tables with foreign key constraints.
关系型数据库的逻辑模型进一步规范化这些实体和关系，并形成带有主外键约束的表。 - Select both primary key table and foreign key table before selecting any field for the relationship.
在选择任何关系字段之前应选择主键表和外部键表。 - This row contains data in a foreign key that requires a primary key value that has been deleted.
此行在外键中包含的某些数据要求主键值，而该主键值已被删除。 - Similarly if two tables are connected via a foreign key, they are connected.
与此类似，如果两张表通过一个外键连接起来，我们也称其为连接的。 - Create a relationship between the primary key and foreign key columns.
在主键列和外键列之间创建关系。 - In the subscription table, this becomes a foreign key to a subscription schedule table.
在订阅表中，此字段成为指向订阅计划表的外键。 - The source table cannot be referenced by a foreign key in another table.
另一个表的外键不能引用源表。 - Use the Relationship connector to define a foreign key between two tables.
使用关系连接线可以在两个表之间定义外键。