This surrogate column can be designated the primary key column.
可以将该代理列指定为主键列。
A primary key column is identified by a primary key symbol in its row selector.
主键列由其行选择器中的主键符号标识。
Rails USES the primary key column id for various recordkeeping and referencing tasks.
Rails使用主键列id来完成各种记录保持和引用任务。
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)。
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。
It sets up two accessors: accessor 0 contains only the primary key column (ID) and accessor 1 contains other columns.
它设置两个访问器：访问器0仅包含主键列id，访问器1包含其他列。
In this type of table, you define a primary key column, a MIME type column, and one or more generic columns as BLOB data.
在这种类型的表中，你定义了一个主键列，一个MIME类型列，和一个或多个通用列用来表示BLOB数据。
You also want to be able to write data to all the columns except the primary key (because you cannot write to the primary key column).
还希望能够将数据写入除主键外（因为不能向主键列写入）的所有列。
Note, however, that we cannot update the primary key columns or any other key columns that you declare; in this case, EMP_ID is a primary key column.
但是请注意，我们不能修改您声明的主键列或任何其他的键列；在本例中，EMP _ ID是主键列。
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。
If you know the primary key information at design time, we recommend that you explicitly specify the primary key column or columns in order to achieve optimal performance.
如果您在设计阶段就已知道主索引键资讯，建议您明确地指定主索引键资料行，以达到最佳效能。
If informational check constraints exist on the primary key column, you should explicitly specify informational check constraints on their corresponding foreign key columns. For example.
如果在主键列上存在信息检查约束，那么应该在它们相应的外键列上指定信息检查约束。
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)。
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。
It queries your database, indexes each column in each row of the result, and ties each index entry to the row's primary key.
它将查询数据库，为结果的每行中的每列建立索引，并且将每个索引条目绑定到行的主键上。
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。
For the sake of simplicity, consider VARCHAR as the default type for every column that is not a primary or a foreign key.
为了简单起见，考虑把VARCHAR作为除主键和外键外的所有列的默认类型。
This is analogous to making a column in a database a primary key.
这类似于数据库中选择一列作为主键。
If a primary key is specified in the CREATE TABLE statement, the first column of the primary key is used as the distribution key.
如果在CREATEtable语句中指定了一个主键，那么主键的首列会被用作分配键。
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。
If you recall, your DB2 table was created specifying the primary key of the ACCOUNT_NUM column.
您可以回想一下，创建db2表时指定了account_num列作为主键。
You've also identified the id column as the table's primary key.
还将ID列标识为表的主键。
If no primary key is specified, the default-partitioning key is the first non-long field column defined on the table.
而如果没有指定主键，默认的分区键则为该表上所定义的第一个不为long字段的列。
Listing 6 defines the relation between a column and a primary key, also represented by Figure 5 following. The relation ensures that.
列表6定义了一个列与一个主键之间的关联，后面的图5也表示了这点。
Given the view's definition, you created a metadata object consisting of four columns and designated one column as the primary key for purposes of your work.
提供了视图定义后，可以创建由4个列组成的元数据对象，并指定一个列为主键以进行以后的工作。
The spatial table has a simple structure: a unique, integer column (objectid), one or more columns making up the primary key (copied from the source table), plus a single point-geometry column.
空间表的结构很简单：一个惟一的整数列(objectid)，组成主键的一个或多个列(从源表复制的)，以及一个点几何列。
Recall that clients were defined with a primary key on the client ID column, so attempting to import duplicate rows will fail.
记得clients对客户ID列定义了一个主键，因此在尝试导入相同行时将失败。
In addition to the id primary key, you've declared the customer_id column to be a foreign key referencing the customer table.
除了id主键以外，还声明了customer_id列作为引用客户表的外键。
The "id" column will be set as the primary key and will be auto-incrementing.
“id”列将会被设置为主键，并且自增。
If any of the tables are missing a primary key, the CDR start sec2er command creates an er key shadow column that ACTS the primary key.
如果任一表缺乏一个主键，则cdrstartsec2er命令将创建一个充当主键的er键影子列。
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