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.

image

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.

Thanks

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