each table has an id field that serves as the primary key.

the first column ( id) is the primary key of the table.

第一列（ID）是此表的主键。

互联网摘选

this happens when no primary key is defined.

即使没有定义主键，这种操作也会发生。

互联网摘选

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。

互联网摘选

this field isn't unique, so you can't use it as the primary key.

该字段不是唯一的，所以不能用作主关键字。

互联网摘选

an entity class needs a primary key.

Entity类需要一个主键。

互联网摘选

automatic primary key and unknown primary key generation

自动生成主键和未知的主键

互联网摘选

the fourth implementation uses a sequence to generate a primary key.

用一个序列产生一个关键字。

互联网摘选

table doesn't have a primary key.

料表有主索引。

provided by jukuu

the primary key should also have an@ id annotation.

主键也应该有一个@ID注释。

互联网摘选

database watermarking algorithm based on virtual primary key

一种基于虚拟主键的数据库水印算法

互联网摘选

choose the cells to be linked to the primary key fields.

选择要链接到主关键字字段的单元格。

互联网摘选

there is already a primary key in this table's key collection.

该表的关键字集中已有一个主关键字。

互联网摘选

the research on the relational database watermarking based on the virtual primary key

基于虚拟主键的数据库水印技术研究

互联网摘选

make sure each table has a primary key.

确保每个表都有一个主键。

互联网摘选

the target table must have a primary key.

目标表必须有一个主键。

互联网摘选

research of ejb ′ s primary key generation strategies based on design patterns

基于设计模式的EJB主键生成策略的研究

互联网摘选

alternative way of creating a primary key and foreign key

另外一种创建主键和外键的方式

互联网摘选

study on influences of primary key stratum on surface dynamic subsidence

覆岩主关键层对地表下沉动态的影响研究

互联网摘选

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。

provided by jukuu

an array of primary key values to test for.

要测试的主键值的数组。

provided by jukuu