This page in a nutshell: Queries can be run against the Wikipedia database in a variety of ways.

Shortcuts WP:DQWP:DQ WP:SQLWP:SQL

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

• Articles withH.M.S. in their title that have not been edited for 12 months.
• Redirects with fewer than 20 incoming links that redirect tocategories
• Allred links on pages within the scope of a particularWikiProject

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

Some queries can be satisfied through the MediaWiki interface:

• Search in advanced mode
• All pages with prefix
• Category tree
• MediaWiki API (seeSpecial:ApiSandbox)

Useful queries that are regularly run can be found at:

• Special:SpecialPages
• Wikipedia:Database reports
• Wikipedia:Statistics

And many other places.

All Wikipedians have the ability to run queries on a copy of the live database on theWikimedia Cloud VPS calledQuarry.

• Wikipedia:Request a query

• wikitech:Nova Resource:Tools/Tools/Query service