Apply a DeletionPolicy attribute to the database resource in the CloudFormation template to retain it upon stack deletion.

Establish a stack policy in CloudFormation to restrict updates to the database resource, safeguarding against unintended changes.

Implement Multi-AZ deployment for database availability, which does not prevent accidental deletions.

Utilize CloudFormation stack sets for managing deployments across accounts and regions, unrelated to preventing database deletions.

Set a DeletionPolicy attribute to the entire stack in CloudFormation, which retains all resources, not a targeted approach to the database.