I am attempting to make a simple bar graph from data that I can obtain from a query. Maybe I am being ignorant, but I am finding it difficult to query more than one column of the table at once. That said, I am only seeing one-dimensional bar graphs. Which is, essentially, not what I want. Can anyone give me some guidance into how to figure this out?
The x-axis in your bar chart will be the first column from your select query and the rest of the columns will be the bars you want to display. For example, if you want to display col1 and col2 by time_stamp, you would do the following:
SELECT t_stamp, col1, col2
FROM group_table