Fetch row based on group and having in influxDB

Question

I'm new at influxDB and trying to solve a query. Where I need to fetch rows based on group by field3 columns and having should count less than 300. I've written it in SQL but not able to fetch any data from influxDB.

select count(field1), count(field2) from powerandlevel where time > now()-10m group by field3 having count < 300

Thanks in advance.