title: Get the hours of a timestamp and display in grafana
body: <p>For my Grafana panel i would like to extract and display the hours of a date from a given timestamp series</p>
  <p>For example the timestamp 1628274040 which is 2021-08-06 18:20:40 (CET) i would like to only have &quot;18:20:40&quot; and display this comparable in my panel (display as graph).</p>
  <p>How to do that? The underlying data is influxDB and the query is influxQL. I searched the grafana dashboard for converting function but dont find any.</p>