This is a disambiguation page, which lists pages which may be the intended target. If a page link referred you here, please consider editing it to point directly to the intended page.

Perhaps you are looking for:

• Manual:Schema changes – how to build schema change patches for MediaWiki core and its extensions
• wikitech:Schema changes – process for getting schema changes applied on Wikimedia production. Also contains some generally applicable advice on schema changes and design.
• Manual:Hooks/LoadExtensionSchemaUpdates – a hook allowing extensions to make changes to the database when update.php is used
• the schemas that describe the format of events logged by the EventLogging extension.
• Proposed Database Schema Changes, proposals for MediaWiki core schema changes between 2004 and 2008.