InFluxDB Excluding Entities

I have a fresh install of the InFluxDB Addon in HA and I’m beginning to find entities I’d like to exclude from the InFluxDB database. I see how to add an exclude in the HA configuration.yaml for InFluxDB but then do I need to delete any existing data in the InfluxDB database? If so, would that be with a query?

Only because I was looking for the same question: see

influx delete \
  --bucket example-bucket \
  --start 1970-01-01T00:00:00Z \
  --stop $(date +"%Y-%m-%dT%H:%M:%SZ") \
  --predicate '_measurement="example-measurement"'

Yup. Got it. Come a long way in the past month. Thanks to InFux documentation and the University.