Configuring Graphs from MySQL Tables

I have MySQL table as below:
submittedTime is - epoch time format
I am trying to configure a graph to get the duration of each user based on submittedTime.


I have successfully added a MySQL data source.
But I am not able to generate graph based on MySQL table.
Can some one please help me out.


What error do you receive? Or why you’re not able to generate the graph?