General database design

Milica Medic

SQL Database design: Choosing a primary key

March 16, 2014 by
A primary key is a column or a combination of columns that uniquely defines each row in a table. When designing a database choosing a primary key is one of the most important steps. A table can contain one or more columns suitable to be a primary key and that column or columns are called a candidate key. Only one candidate key can be selected as a primary key Read more »