Wikipedia:Database queries: Difference between revisions

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Latest revision as of 06:48, 22 May 2023

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{{nutshell

{{shortcut|WP:SQL}}

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{{nutshell|Queries can be run against the Wikipedia database in a variety of ways.}}

== Overview ==

Much of the data that makes up the Wikipedia encyclopaediaencyclopedia is stored in a [[SQL database]]. It can sometimes be useful to run queries against this database to extract information that is otherwise hard to find. For example:

* Articles with ''H.M.S.'' in their title that have not been edited for 12 months.

* [[WP:Redirect|Redirects]] with fewer than 20 incoming links that redirect to [[WP:Category|categories]]

* All [[WP:Red tube link|red links]] on pages within the scope of a particular [[WP:WikiProject|WikiProject]]

Many simple queries can be run directly using the tools built into the [[MediaWiki]] package used by Wikipedia. Some of the most popular and useful queries are run regularly and can be found at [[Wikipedia:Database reports]]. If neither of these suits your query, you can [[Wikipedia:Request a query|request]] that someone run a query for you, or download your own copy of the database to work on.

== Using the MediaWiki tools ==

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* [[Special:PrefixIndex|All pages with prefix]]

* [[Special:CategoryTree|Category tree]]

* [[mw:API |MediaWiki API]] (see [[Special:ApiSandbox]])

== Queries that are already run regularly ==

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And many other places.

== Requesting thatRun a query be run ==

SomeAll Wikipedians have the ability to run queries on a copy of the live database on the [[WP:Toolserver|toolserver]].Wikimedia Cloud YouServices|Wikimedia mayCloud requestVPS]] they do this atcalled [[tswiki:Query//quarry.wmflabs.org/ service]Quarry].

== Request a query ==

* [[Wikipedia:Request a query]]

== See also ==

Users with both technical access to the database and the willingness to perform queries may be found by viewing the [https://wiki.toolserver.org/w/index.php?title=Special%3AListUsers&group=query-service&limit=50 list of query-service users].

*[[wikitech:Nova Resource:Tools/Tools/Query service]]