The database is not automatically removed when deleting your Nais application. Remove unused databases to avoid incurring unnecessary costs. This is done by setting [cascadingDelete](/workloads/application/reference/spec.md#gcpsqlinstancescascadingdelete) in your `nais.yaml`-specification.

To remove a database completely without deleting the application:

1. First, set [cascadingDelete](/workloads/application/reference/spec.md#gcpsqlinstancescascadingdelete) to `true` in the application spec and deploy it
2. Remove `sqlInstances` from the application spec and deploy again

The database and the instance it runs on should now be completely removed after a short while.