How to delete value range in InfluxDB/Grafana?

[Joo01]

Thanks a lot!
Found also the thread here:

InfluxDB: Removing or deleting data

That is to be expected. Your query only deletes measurements, it does not return any.

That query helped me (I was very close ):
DELETE FROM "kWh" WHERE ("entity_id"='hausstrom_zahler_monat') AND time <= '2023-03-31 21:59:10'