primary key

primary key 基本解释

[计] 主关键字

词组短语

1、primary key auto 主键自动

2、primary key index 主键索引

3、primary key violated 违反主键

4、violation of primary key 违反主键

5、violation of primary key constraint 违反主键约束

6、multiple primary key defined 定义了多个主键

7、concatenated primary key 串联主键

primary key 用法和例句

1、Defining a Primary Key for a Table

为表定义主键

2、Is a bit map of the primary key columns in the table.

表内主键列的位图。

3、For a primary key column, but it can be set for any column.

但也可为任意列设置该值。

4、This surrogate column can be designated the primary key column.

可以将该代理列指定为主键列。

5、The column may not have a PRIMARY KEY or UNIQUE constraint.

这个字段也许没有一个主键或唯一得限制。

6、Named queries and views may also omit the primary key column for a table.

命名查询也可能遗漏表的主键列。

7、An identity column or a column used in a primary key, cannot allow nulls.

标识列或主关键字中得列得值不能为空。

8、To constrain, and a value specifying whether the constraint is a primary key.

和指定约束是否为主键的值, 初始化。

9、However, you can change the order of columns after the primary key is created.

但是, 可在创建主键后更改列的顺序。

10、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。

重点词汇

primary adj. 首要的，主要的；最早的，原始的；[地质学]原生的；基本的 n. 第一位；最好者；要素；候选人提拔会