Hi everyone,
I am new to this concept.

I need your help for Grouped Categories Multi Level Drill Down Bar Chart.

Example:
Category 1: Cars
Category 2: Bikes
.....
Category n: Buses

Category 1: Cars

i)Minimum sold cars
ii)Average Sold Cars
iii)Top Sold Cars

First Drill Down:
Here, I need Brand Wise Minimum, average , Top Sold Cars Details,

Second Drill Down:

Here I want to do Country Wise Minimum, average , Top Sold Cars Details,

Third Drill Down:
Here I want to do State Wise Minimum, average , Top Sold Cars Details,

Fourth Drill Down:
Here I want to do City Wise Minimum, average , Top Sold Cars Details,

How to do for this, I can not get any chart for grouped category drill down bar chart,

You need to provide more information in order for anyone to understand what you are doing. First of all your data structure. Secondly your server side code. And third your client side code. What do you mean “bar chart” are you using a JS plug in ? Is it something that you made your self , or you just need to get those numbers server side?