what is Primary Key in SQL Server
Interview question and answer by: Sriramnandha
| Posted on: 6/3/2012 | Category: SQL Server Interview questions
| Views: 594 | | Points: 40
A Primary Key in a table uniquely identifies each and every row with out allowing Nulls. There are two types of Primary Keys:
1) Simple Primary Key ==> Defining primary key on a single column is called Simple Primary Key.
2) Composite Primary Key ==> Defining Primary Key on more than one column is called Composite Primary Key.
| Alert Moderator
Found interesting? Add this to: