How to plot

[Andrew Z]

Hello,
 i'd like to create a graph/plot based a DB table's data, but not sure
where to start. I

 also would like to have the following functionality:
 a. i'd like to have it in the separate window ( xwindow to be precise).
 b. and i'd like to have the graph updating with every record added to the
table.

The workflow:
 a. main code is running and occasionally adding records to the table
 b. graph gets updated "automagically" and is shown in a separate from the
main terminal window.

Main program does not have GUI, nor is Web based, just runs in the terminal
on Xwindows.

i don't' really care about cross-platform compability and only want to run
that on linux xwindows.

Thank you for your advise.