I have the paid extension of art table. I seem to fail at understanding how to generate correct chart using SQL Query.
I would like to draw a simple linechart with a SQL query that take two column from a table such as : "SELECT column1, column2 FROM sample_table". I expect that either column 1 or column 2 should be used for the x- or y-axis, but it doesn't seem so.
I don't understand how I should write my query to generate a linechart. Could someone help me ?