PL/SQL Challenge 每日一题：2016-12-29 分析函数

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Wikimedia Commons is a repository of free images, videos, sounds and other multimedia files. Uploaded files can be used as local files by other projects on the Wikimedia servers, including Meta-Wiki, MediaWiki, Wikibooks, Wikinews, Wikipedia, Wikiquote, Wikisource, Wikiversity, Wikivoyage, and Wiktionary. The InstantCommons feature also supports imports on other wikis.

This page is an index of all Wikimedia Commons' maintenance and Help pages. The following articles contain guidance and information about reading, authoring, and participating in the Commons community.

Having trouble finding out what you need to know? If it's not covered by the Frequently Asked Questions (FAQ), try asking at the help desk.

General information Help page collections A larger set of help pages can be found in Wikipedia that you might want to consult: MediaWiki help contents and technical manual Meta-Wiki help contents and portal Wikipedia help contents and portal Community pages Basic pages: Main Page, Welcome page, Community portal, Village pump, Help:Searching Maintenance pages: Admin noticeboard, Deletion requests, Categories for discussion, Renaming a file, Renaming a category Getting help: If you want to post a question about copyright issues that another editor will respond to, you can go here. If you have a general question about editing, uploading, the scope of the Wikimedia project, or anything else, you can post a question at the Help Desk and another user will reply. MediaWiki The function of MediaWiki itself – the software that Wikimedia Commons runs on – is described at the MediaWiki User's Guide in Meta-Wiki. If you suspect a software bug, ask for feedback at the village pump, and then report it using the Phabricator bug report system. This is the only way to get MediaWiki developers to notice your bug reports. The database of Wikimedia Commons can be downloaded. There is currently no dump of the media files available. Legal information and contact Contact us, General disclaimer, Privacy policy, Licensing

Wikimedia Commons help contents Help for editors Information for beginners: Commons:Sandbox (for experimenting) First steps: Account, Upload form, License selection, Quality and description, Sorting, File transfer and tools, Reuse, Structured data Frequently asked questions, Project scope, Category system, Language policy, Namespaces Copyright information: Licensing, Copyright rules by territory, Copyright violations & deletion guidelines, Email templates General information: Editor's index to Commons, Structured data Software helpful for Wikimedia Commons: Media playback help Software and tutorials for editing media files Video guide for uploading and using video files Audio, Converting video, File types, Manipulating meta data Help:Creating a DjVu file Help:Scanning Help:SVG Tools for making work in Commons easier Upload tools Content: Free media resources, Map resources, Image casebook (Copyright rules by subject matter), Problematic sources, Bad sources Templates: Copyright tags, Tag categories, audio templates, Infobox templates, Taxobox, Template messages, language templates