主键

主鍵

zhǔjiàn

noun

Measure Word

一个主键 gè

Meanings

1 primary key (database)

Characters

Examples

每张表都应该有一个主键。

Měi zhāng biǎo dōu yīnggāi yǒu yīgè zhǔjiàn.

Every table should have a primary key.

主键不能重复,也不能为空。

Zhǔjiàn bùnéng chóngfù, yě bùnéng wèi kōng.

A primary key can't be duplicated and can't be null.

Tips

usage

键 jiàn means "key" in the database and keyboard sense — the same character is used in 快捷键 shortcut key. A physical door key is 钥匙 (yàoshi).

Stroke Order

主 zhǔ

键 jiàn