If you can select it, gselect will graph it!
gselect executes user defined select statements and instead of returning the result set as a series of rows, it returns a graph of the result set as a (bmp, png, jpeg, ...) image.
Each column in the graph maps to a distinct set of values in a column of the result set, and each row in the result set is drawn as a line connecting the columns in the graph.
It's _not_ your garden variety x-y line graph (eg. MRTG), but it will graphically display parallel coordinates in a result set with minimum fuss, for quick and easy visual analysis and refinement.
(gselect is written in python, to work on a mysql database.)