primary key是什么意思

网络释义

用法例句

alternate key

替代关键字,备用关键字

key field evaluation character set

关键字段求值字符集

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。

Index rebuild is only available for Primary or Unique keys (Foreign keys do not have enforcing indexes).

索引重建仅适用于主关键字或唯一关键字（未强制索引外部关键字）。

key coding element location

关键字编码元素单元

key-equals-address addressing

关键字等于地址的寻址

the keyboard has standard, alphanumeric keys

键盘有了标准的字母键，

a typewriter ribbon, keyboard

打字机色带、 键盘.

He is striking the key of his typewrite.

他敲打着打字机的字键。

Press `Shift' and type `A'.

按‘换字键’然後打字母‘A’.

Layout of the Chinese ideographs on keyboard

GB/T7513-1987汉字整字键盘盘面字排列

Fast and instant are the key words.

“快速”是关键的两个字。

key computer priner

计算机的键盘打字机

teleprinter keyboard selection

电传打字机键盘选择

jammed the typewriter keys.

打字机的按键卡住了

A terminal containing less than a full alphanumeric keyboard; for example, one containing ten numeric keys plus control keys.

一种终端，它的键盘不包括全套的字母数字字符键；例如，只包括十个数字键以及若干控制键。

insert program status word key

插入程序状态字关键码

program status word key handling

程序状态字关键码处理