Each primary key value relates to only one record (or no records) in the related table.
每一个主键的值，只能关联到另外一张表的一条或者零条记录。
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)。
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。
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。
Version 2.0 of the EJB specification defines a primary key class as any class that is a legal value type in RMI-IIOP.
EJB规范的 2.0版将主键类定义成任何是 RMI-IIOP中合法值类型的类。
InsertJSON expects two input parameters: the unique key value for primary key and the row data in JSON format.
insertJSON需要两个输入参数：主键的惟一键值与json格式的行数据。
This node object is populated with data from the database record in the node and node_revisions tables, whose primary key field value is the same as the node id in the URL.
用node和 node_revisions表中的数据库记录数据填充这个节点对象（node object），这个记录的主键字段值与URL 中的节点id相同。
Note that this assumes that key columns are never updated; once a row exists, it is immutably tied to its primary-key value.
注意，这假设从不更新键列；一旦一行存在了，它的主键值就不变了。
Another user or application has already deleted this record, or changed the value of its primary key.
其他用户或应用程序已经删除了该记录或更改了其主要关键字的值。
Alternatively, you could define the primary key to use Identity value generation at the time you were defining the table and adding the primary key column itself.
您还可以选择，定义主键值，来在定义表格和添加主键值列本身时使用identity值生成。
Make a separate table for each set of related attributes, and give each table a primary key. Each field contains at most one value from its attribute domain.
为每个相关属性的集合创建一个单独的表，并为每个表指定一个主键。每列最多包含一个来自其属性域的值。
Another user or application has deleted this record or changed the value of its primary key.
其他用户或应用程序已经删除了该记录或更改了其主键的值。
Setting the primary key to use the Identity Value Generation function has some other interesting things to be aware of.
设置主键值以使用IdentityValueGeneration功能，有一些很有意思需要注意的地方。
You can't update the record because another user or application deleted it or changed the value of its primary key.
由于其他用户或程序已经删除了该记录或更改了其主键的值，所以无法对其进行更新。
The primary key is ID, and is a generated HEX value for referencing the object. The following is sample DB2 DDL.
主键是ID，而且它是一个生成的hex值，用于引用对象。
Because each row has a unique primary key, no two rows share the same key value.
由于每一行都具有唯一的主键，因此任何两行都不会共用同一键值。
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.
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。
Make sure you are not trying to assign a value to a primary key field where the primary key already exists in the data table.
确定您未尝试将值指定至主索引键栏位，而此栏位中的主索引键已存在于资料表中。
Gets a value that indicates whether the primary key of any row in the collection contains the specified value.
获取一个值，该值表明集合中任何行的主键列是否包含指定值。
Gets a value that indicates whether the primary key columns of any row in the collection contain the values specified in the object array.
获取一个值，该值指示集合中任何行的主键列中是否包含在对象数组中指定的值。
Gets a value indicating whether a property is in the primary key in the underlying data.
获取一个值，该值指示某一属性是否表示基础数据中的标识字段。
Gets a value indicating whether a property is in the primary key in the underlying data.
获取一个值，该值指示某一属性是否表示基础数据中的标识字段。
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