Primary Key
type: Ontology
creation date: 2026-08-06T07:58:50+02:00
imports: http://semantic-mediawiki.org/swivt/1.0

Primary Key
type: Subject
type: Category:Glossary
page: https://wiki.openmod-initiative.org/wiki/Primary_Key
wiki namespace: 0
glossary abbreviation: PK
glossary definition: 1. A primary key is a field in a table that contains unique data.
glossary definition: 2. A Primary Key ist a non-empty set of columns that contain non-null values and whose values uniquely identify a row. A table cannot have more than one PrimaryKey. Often the term PrimaryKey is used to refer to a set of columns which is a strict subset of all of the columns in the table. In many cases it is assumed that the PrimaryKey consists of a single column.
glossary sources: https://en.wikibooks.org/wiki/A-level_Computing/AQA/Problem_Solving
glossary sources: _Programming
glossary sources: _Operating_Systems
glossary sources: _Databases_and_Networking/Databases/Primary_keys (1.); http://wiki.c2.com/?PrimaryKey (2.)
glossary subterm of: Database table
wiki page creation date: 2017-11-02T12:42:02Z
creation date#aux: 2458060.0291898
wiki page last editor: User:Lilly Schoen
wiki page modification date: 2017-11-02T12:42:02Z
modification date#aux: 2458060.0291898
wiki page is new: true
wiki page sort key: Primary Key