What is a primary key?

What is a primary key? Here are some definitions.

Noun (computing) In the design of a database table, the primary key (abbreviated PK) is selected among the non-empty set of candidate keys. The PK is a column (or an irreducible group of columns) able to identify every row of the table. Find more words! 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Technically allowed and catalysed by the use of biometric data as primary key, a new trend emerges. Object relationships in UML models are implemented as primary key and foreign key in database. As you can see, I believe that accountability, in all of its facets, is a primary key to the governing of global development. We recommend to you to prefer the installation of a numerical primary key for each one of your tables. Tables for which the set of key fields differs from primary key fields are synchronized much faster now. See Also Sentences with the word primary key What is the plural of primary key? Nearby Definitions primarying primary industry primary industries primary immunodeficiency primary immunodeficiencies primary hypothermia primary keys primary legislation primary market primary markets primary myelofibroses primary myelofibrosis