It depends on where your database is stored. If your bot uses a separate database service (like PostgreSQL, MySQL, MongoDB, or Redis deployed as its own service), that data is independent of your bot's deployments and will persist across redeploys. If your bot stores data in a file on the local filesystem (like SQLite), that storage is ephemeral and will be erased on each redeploy unless you attach a volume to persist it.

how to attach a volume to persist it?