primary key
英 [ˈpraɪməri kiː]
美 [ˈpraɪmeri kiː]
主关键字；主键标
双语例句
- 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。 - Therefore, you need to map the foreign key attribute in Employee to the Department's primary key.
因此您需要将Employee的外部关键字属性，与Department的主关键字映射上。 - The second form is system identifiers for recording the primary key used in other applications that store the product.
第二种形式是系统标识符，用于记录其他存储产品的应用程序中使用的主键。 - 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 target table must have a primary key.
目标表必须有一个主键。 - When a primary key constraint is defined, the federated system automatically creates a unique index specification.
当定义一个主键约束时，联邦系统自动创建一个惟一的索引规范。 - As we mentioned above, they all have a column named ID as a primary key.
前面我们提过，它们都有一个叫作ID的列，并将该列作为主键。 - 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 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。 - Every record in the table has a unique ID called the primary key.
表中的每个记录都有一个惟一的ID，称为主键。 - Above, a many-to-one relationship is defined across a foreign key that is also part of a primary key.
在上例中，跨外键（也是主键的一部分）定义了多对一关系。 - The primary key and any unique index of the table must be a superset of the associated partitioning key.
表的主键和所有惟一索引都必须是相关分区键的超集。 - Note that insert, update and delete are only allowed on tables that have a primary key.
注意，只能在具有主键的表上进行插入、更新和删除。 - The primary key should also have an@ ID annotation.
主键也应该有一个@ID注释。 - 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。 - In this case, there is no primary key available in the EPR.
在这个范例中，EPR中没有可用的主键。 - The second ( REF_ESTATE_ID) is the column name from the other table's primary key.
第二个（REFESTATEID）是另外一个表的主键的列名。 - This includes both DDS-created files and SQL indexes as well as physical files with a Primary Key constraint.
这包括DDS创建的文件和SQL索引，以及带有PrimaryKey约束的物理文件。 - The first two columns selected and inserted are simply the primary key.
选择和插入的前两列就是主键。 - This becomes the primary key in the physical model.
这成为物理模型中的主键。 - However, you may need to manually define a primary key in the data source view.
但是，您可能需要在数据源视图中手动定义主键。 - 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。 - This primary key is called the "system security key" in netsh wlan commands.
这个主密钥在netshwlan命令中叫做“系统安全密钥”。 - The primary key of a table must be unique to identify the record in the table.
为了识别表中的记录，表的主键必须唯一。 - This row contains data in a foreign key that requires a primary key value that has been deleted.
此行在外键中包含的某些数据要求主键值，而该主键值已被删除。 - Each table in the database can have at most one PRIMARY KEY constraint.
每个数据库表上最多只能定义一个PRIMARYKEY约束。 - Create a relationship between the primary key and foreign key columns.
在主键列和外键列之间创建关系。 - Null value is not allowed in unique index or primary key.
唯一性索引或主键中不允许有空值。 - Setting a field as the primary key automatically defines the field as unique.
将字段设为主键会自动将字段定义成唯一的。 - The Primary Key on the mobile device collides with one in the host database.
移动设备上的主码与宿主机数据源中的主码冲突。