FlipKart Offer

Translate to Tamil

Amazon Best Offer

AliExpress Offers

Online Income

Friday, 7 January 2011

What is PRIMARY KEY?

A PRIMARY KEY constraint is a unique identifier for a row within a database table. Every table should have a primary key constraint to uniquely identify each row and only one primary key constraint can be created for each table. The primary key constraints are used to enforce entity integrity.

 Share This Post


Smilely

Services

© 2014