title: How to display the last value in Grafana Gauge
body: <p>I'm new to using Grafana and I'm trying to display the last value of a table that's organized by dates in a Gauge visualization.
  All the options I'm seeing to displaying the data are grouping methods like max, average, sum and so on.
  Is there a way to get only the latest most updated value from that table? And to always display it?
  I'm using Grafana v7.1.3 and ES.</p>