influxdb
# https://docs.influxdata.com/influxdb/v1.2/query_language/database_management/#drop-series-from-the-index-with-drop-series
DROP SERIES FROM /.*/ WHERE "environment_label" = 'None'
# show keys, query types
curl --silent 'http://influxdb-service.local:30087/query?db=os_req_metrics&pretty=true' --data-urlencode 'q=SHOW FIELD KEYS FROM "os_req_metrics"'