The Database Knowledgebase on the Web

KNOWLEDGEBASE:

SQL

Oracle

MySQL

Postgres 

General topics 

Glossary 

Glossary

Select a letter to browse the glossary. You may also enter a search phrase in the Google search box below to search the entire site.

0 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Key - A key is an attribute, or set of attributes that identifies a row or set of rows. A primary key uniquely identifies a single row in a table. A foreign key will identify a row, or rows, in a different table. A unique key works much like a primary key in that it uniquely identifies a specific row in a table.

Contact: Lewis Cunningham
lewisc@databasewisdom.com

About us

Contact us

Support us

Authors, Share Your Book with Millions of Readers

Search Database Wisdom