Solved :How to tell what fields are available

Allthough I am familiair with MS SQL it is not easy for me to understand how grafana (and Influxdb) works.

I created a simple query that shows what I expect, but when trying to create another I do not get any results.
Because I am not sure that some “fields” are stored correctly in Influxbd, i was hoping there is a possibility to do something like Select * from table ‘****’ to show the proper fieldnames

Can someone give me a hint how to retrieve this kind of Information ?

Solved : I found a way to open a terminal session to connect to influxdb