Question

Đêfine primary kèÿ?

Answer 1

HEY DEAR!!

HERE IS YOUR ANSWER...

A primary key, also called a primary keyword, is a key in a relational database that is unique for each record. It is a unique identifier, such as a driver license number, telephone number (including area code), or vehicle identification number (VIN). A relational database must always have one and only one primary key.

HOPE HELPED:)

THAT'S ANANYA ✌✌

Answer 2

Hi....

it must contain a unique value for each row of data .......it is for identification....
.Thanks..