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Compared to a list, a category may have both advantages and disadvantages. Example of a category page. Every page in the article namespace should have at least one category. Categories should be on major topics that are likely to be useful to someone reading the article. For example:
[[Category:Category format templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Category format templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
[[Category:Example-formatting templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Example-formatting templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
To display all subcategories at once, add a category tree to the text of the category page, as described at Help:Category § Displaying category trees and page counts. Category pages can have interlanguage links in the "Languages" list in the left sidebar (in the default skin), linking to corresponding categories in other language Wikipedias.
This category is not shown on its member pages unless the appropriate user preference (appearance → show hidden categories) is set. Pages in category "Articles with example PHP code" The following 35 pages are in this category, out of 35 total.
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To download a subset of the database in XML format, such as a specific category or a list of articles see: Special:Export, usage of which is described at Help:Export. Wiki front-end software: MediaWiki. Database backend software: MySQL. Image dumps: See below.
The following is provided as an overview of and topical guide to databases: Database – organized collection of data, today typically in digital form. The data are typically organized to model relevant aspects of reality (for example, the availability of rooms in hotels), in a way that supports processes requiring this information (for example, finding a hotel with vacancies).