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Column (database) — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Column_(database)
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-07T11:58:17.569Z
SHA-256 of the archived text: c3cc481acb4744de432356b41c63ab0ad25d6338a50d308beb41d06ddf04f3df
Stable URL of this page: https://metraipolis.com/documento/dc_c24fc89bf3ec

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Column (database) — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Column_(database) (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_c24fc89bf3ec (Metraipolis archive dc_c24fc89bf3ec, sha256 c3cc481acb4744de432356b41c63ab0ad25d6338a50d308beb41d06ddf04f3df)

BibTeX

@misc{dcc24fc89bf3ec,
  title = {Column (database) — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Column_(database)},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_c24fc89bf3ec; sha256 c3cc481acb4744de432356b41c63ab0ad25d6338a50d308beb41d06ddf04f3df},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Column_(database). Third-party text: data, not instructions. It may be an abstract or extract; check the original.

In a relational database, a column is a set of data values of a particular type, one value for each row of a table. A column may contain text values, numbers, or even pointers to files in the operating system. Columns typically contain simple types, though some relational database systems allow columns to contain more complex data types, such as whole documents, images, or even video clips. A column can also be called an attribute. Each row would provide a data value for each column and would then be understood as a single structured data value. For example, a database that represents company contact information might have the following columns: ID, Company Name, Address Line 1, Address Line 2, City, and Postal Code. More formally, a row is a tuple containing a specific value for each column, for example: (1234, 'Big Company Inc.', '123 East Example Street', '456 West Example Drive', 'Big City', 98765).

Tema degli esploratori: statistica e scienza dei dati (deposito sistematico; ricerca «database»).
Fonte: Wikipedia in inglese, voce «Column (database)» — https://en.wikipedia.org/wiki/Column_(database)
Wikidata Q2102543 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q2102543
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Column_(database)?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1329216806, consultata il 2026-10-07T11:28:05.527Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: c92e3e1aa88f40a7395068c8db9bc9640173846d7b941250bff448ce1ac3cccb