Hi Everybody,
I want to make a Bar Gauge with data from a PostgreSQL database in Grafana 8.
I use the following command as shown in the picture.
But it didn’t works out. 
I want to make a chart like below.
But then with the duration time as time time column. And not the start time as shown in the picture below.
I want to get a bar gauge with the duration time for every category.
I tried a lot of things but I can’t find the right solution.
Can anyone help me?