> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/deployment-resources/engineering-and-design-reference/migrate-and-upgrade/upgrade-sql-server.md).

# Upgrade SQL Server

Check supported Microsoft SQL Server upgrade paths before upgrading Command Centre.

Microsoft SQL has its own supported upgrade paths, and they are crucial during a Command Centre upgrade. Some scenarios are not supported and the upgrade will fail.

Check the Microsoft documentation before you upgrade an instance: [Upgrade SQL Server](https://learn.microsoft.com/en-us/sql/database-engine/install-windows/upgrade-sql-server?view=sql-server-ver16). It covers the pre-upgrade checklist, unsupported scenarios, the tables of supported upgrade paths from earlier versions, and edition upgrades.


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