# 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 %}