> For the complete documentation index, see [llms.txt](https://next-docs.cloudio.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://next-docs.cloudio.io/app-deployment/sql-migrations.md).

# SQL Migrations

Database changes can be automatically deployed during server startup or on demand using CloudIO CLI.

SQL scripts must be named in `io_YYYYMMDDHHmmss_some_description.sql` format and placed under the respective application migration folder. Any metadata scripts that create or alter the metadata tables in cloudio schema must be placed under `cloudio` folder.

{% hint style="warning" %}
Note: File name must be unique. Once migrated any further changes to the script will be ignored.
{% endhint %}