This URI gets an Actor with primary key m1
这个URI会获取一个带有主键m1 的Actor
TransactionId: ID of the transaction; primary key of the bean.
transactionId：事务的ID,bean的主键。
The getCatalog() operation takes a primary key and returns Catalog
getCatalog()操作接受一个主键作为参数，并返回Catalog
The DAO may allow queries based on criteria other than the primary key.
DAO可允许基于除主键之外的标准进行查询。
If there is no primary key, the first column that is not a long field is used.
如果没有主键，就会使用非长型字段的首列。
You don't need to worry about messing around with the primary key or foreign key.
您无需担心处理主键或外键的麻烦。
Each record saved in the datastore, also called an entity, requires a primary key.
保存在数据存储中的每一条记录，即实体，都需要有一个主键。
Multiple attributes in the entity may be combined to form a composite primary key.
实体中的多个属性可以组合成一个复合的主键。
On the next page, you choose where to retrieve the value of the primary key (Figure 28).
在接下来的页面中，您要选择在什么地方检索主关键字的值(图28)。
On the primary key Tasks page, select deptno as the primary key for the Department entity.
在主要关键字Tasks页面中，选择deptno以作为Department实体的主要关键字。
This article described three approaches to implementing a surrogate key as primary key.
本文描述了实现作为主键的代理键的三种方法。
You can adjust the primary-key creation strategy or even specify a composite primary key.
可以调整主键的生成策略，甚至指定复合主键。
If one is not supplied, one is created by default from the first column of the primary key.
如果没有提供分区键，则默认地从主键的第一个列创建分区键。
This indicates that the relationship will be created for a static non-primary key property.
这表明将为一个静态非主键属性创建关系。
An alphanumeric part number. This part number is unique and could suffice as the primary key.
字母数字零件号此零件号惟一并且可以用作主键。
In Listing 5, you have a standard primary key column called PO_ID (that is, purchase order ID).
在清单5中，您有一个称为PO_ID的标准主键列(即订单id)。
As noted previously, of course, the primary key logic found in the application isn't bulletproof.
当然，如前所述，应用程序中的主键逻辑并不是很保险。
But more important, you can now use something other than the primary key in the URI to view them.
但更为重要的是，您对URI使用其他内容而不是主键来查看它们。
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。
If an error message appears stating that a primary key is not defined, select empno as the primary key.
如果出现一条出错信息，声称没有定义一个主关键字，那么您可以选择empno作为主关键字。
So a different solution was found if an identifying column like a primary key is found in the table.
所以，如果在表中找到一个标识列，例如主键，则可以找到一种不同的解决方案。
The typical method is to look up the entity by its primary key, because that will guarantee a unique result.
典型的方法是根据实体的主关键字进行查询，因为这可以保证产生一个独一无二的结果。
Similarly, relational database rows are also unique, so long as they are identified by primary key values.
同样，关系数据库中的行也是惟一的，它们由主键值标识。
The main characteristics of the primary key are that it is unique and stable -- it is unchanging over time.
主键的主要特征是，它是惟一的、稳定的 —— 它不会随着时间而改变。
A primary key is a special thing in the relational model: It must be unique to each record (row) of a table.
在关系模型中主键是特殊的事物：它对于表的每个记录(行)必须是唯一的。
To convert an existing column into a primary key, click on the column (property in the class) in the diagram.
要转换一个已有的列成为一个主键，在图中点击这个列(类中的属性)。
The application never knows what value is put into the primary key column after running the INSERT statement.
在运行insert语句之后，应用程序将永远都不知道放入了主键列中的是什么值。
There is exactly one primary key and at most one secondary key for the wireless Hosted Hetwork on any computer.
在任何计算机中，无线承载网络都有且只有一个主密钥，一个第二密钥。
The majority of the Amazon storage patterns were based on primary key access leading to single value or object.
亚马逊的大多数存储模式都建基于通过主键访问某个值或对象。
A primary key can also be created by selecting the primary key tool in the tool palette and clicking on a table.
主键也可以通过选择工具面板中的Primary Key工具并在表上点击一下进行创建。
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