该数据集还描述了这两个表的主键。
The DataSet also depicts the primary keys of the two tables.
实际上关键是表的主键的指向。
The key is in fact the primary key of the table that to which it refers.
如何在不使用任何连接两个表的主键？
想要它成为表的主键，使用 @Id注释来声明。
You want this to be the primary key for your table, so use the @Id annotation to declare this.
表的主键和所有惟一索引都必须是相关分区键的超集。
The primary key and any unique index of the table must be a superset of the associated partitioning key.
星型模式要求生成并适当使用事实表和维表的主键或外键。
The star schemas require the generation and proper use of primary or foreign keys for the fact and dimension tables.
它们包含了持有者的专有名称的信息，可以作为路由表的主键。
They contain information in the subject's distinguished name, which can be used as a key into a routing table.
如果在声明中不包括外键，Derby将假定引用的是其他表的主键。
If you don't include a foreign column in the declaration, Derby assumes that you're referencing the primary key of the other table.
最后使用field字段(该表的主键)更新employee表中的雇员名称。
Then it updates the employee name in the employee table using the identifier field, which is the primary key for this table.
请考虑一种典型情况：所有数据库表的主键都是Long类型的，但是列名可能不一样。
A typical example: Even if the primary key is always a Long across all database tables, the column names might be different.
location表包含一个外键(region_id)对应region表的主键。
The Location table contains a foreign key (region_id) that corresponds to primary key of the region table.
airline表的主键(airline . id)会作为flight表的外键。
Shows up as the foreign key in the Flight table. In the select field, notice that airline.id.
此行为的发生是由于在“数据窗体向导”中未选择数据库表的主键或“非null”列。
"This behavior occurs because the primary key or the" not NULL "column of the database table was not selected in the data Form Wizard."
而且这种方法在为每个表的主键提供完全一致和可预测的名称以及格式方面有着额外的优势。
And the approach has the additional advantage of giving every table's primary key an identical and predictable name and format.
其他列属性可以包括：该列是否是表的主键，用户是否必须向列中输入一个值，以及其默认值是什么。
Other column properties can include whether the column is the table's primary key, whether users must enter a value into it, and what its default value is.
如果表的主键或惟一性约束中指定了这个列，那么不允许使用这个子句(SQLSTATE 42831)。
This clause is not allowed if the column is specified in the primary key, or in a unique constraint of the table (SQLSTATE 42831).
定义：当两个表中，一个表的外键和另一个表的主键存在一种关联关系，我们把这种关系称为数据库关系。
Definition: a relationship exists between two database tables when one table has a foreign key that references the primary key of another table.
该表的主键应当命名为module_ContentPageID，连同要针对该模块收集的其他字段的名称。
The primary key of this table should be named module_ContentPageID, along with the names of additional fields you want to collect for the module.
简单地运行两次会产生错误，因为相同的星星名称（作为表的主键）使用了两次，则会由于重复的主键值导致错误。
Simply running it twice will produce an error, because the same star names (which are the primary key for the table) are used again, causing an error with duplicate primary key values.
这只是一个由两列构成的基本的表，以模板名作为主键，所以任何两个模板都不能具有相同的名称。
This is just a basic two-column table with the template name as the primary key, so no two templates can have the same name.
表间关系、主键列和其他有关目标数据的信息也是通过元数据对象指定的。
Inter-table relationships, primary key columns, and other information about the target data is specified through the metadata object as well.
INSERT_UPDATE将新的输入数据添加到表中，或者用具有匹配主键值的输入数据更新现有的行。
INSERT_UPDATE adds new input data to the table, or updates existing rows with input data that has matching primary key values.
主复制要求所有节点通过访问主节点来获得关于表、列和主键的字典信息。
Master replicates require all nodes to access the master node to obtain the dictionary information about tables, columns, and primary keys.
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。
For foreign key creation, another table with a primary key with a compatible data type is required.
其原因是：规范化需要更多的表，连接等操作，主键、索引，从而需要更多的内部操作。
The reason: Normalization requires more tables, table joins, keys and indexes and thus more internal database operations for implement queries.
数据库为一个表格的主键生成值(通过扩展，为相关表生成外主键)，从而将程序从这项任务的重担中解放出来。
Having the database generate values for the primary key for a table (and by extension, any foreign key values for related tables) eliminates the burden from the application from having to do so.
切记，对于要工作的表之间的关系而言，关系的一的方面的主键字段一定要与关系的多的方面的外键字段相匹配。
Remember that for relationships between tables to work, the primary-key field on the one side of the relationship must match up to the foreign-key field on the many side of the relationship.
模板由关于数据库的模式信息、一组表、列属性和标识行的主键构成。
A template consists of schema information about a database, a group of tables, column attributes, and the primary keys that identify rows.
复制模板包含数据库的架构信息、一组表、列属性、标识行的主键。
Replication templates contain schema information about a database, a group of tables, column attributes, and the primary keys that identify rows.
如果任一表缺乏主键，那么该表将被改变，以添加充当主键的ER影子列键。
If any of the tables are missing primary keys, those tables are altered to add er shadow column keys that act as primary keys.
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