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.
第一列(ID)是此表的主键。
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.
行键是表的主键，通常是一个字符串。
The row key is the primary key of the table and is typically a string.
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.
还将ID列标识为表的主键。
You've also identified the id column as the table's primary key.
如何在不使用任何连接两个表的主键？
唯一约束是表的主键，因此不能移除。
Can't remove unique constraint since it's the primary key of a table.
通常，源表的主键值是一个很好的选择。
Usually, the primary key field of the source table makes a good choice.
Time表的主键是 date_time。
keys视图允许定义表的主键、惟一键和外键。
The keys view allows you to define primary, unique, and foreign keys for the table.
customer表的主键是cust_num。
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.
location表的主键是location_id。
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.
事实上这是dw_authors表的主键，因此必须有。
In fact, it's the primary key of the dw_authors table, so it must exist.
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.
第二个（ REF_ESTATE_ID）是另外一个表的主键的列名。
The second (REF_ESTATE_ID) is the column name from the other table's primary key.
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.
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