Date range by single date field in database table

[#1]

I have a database table which has 2 fields orderDate and orderAmount. Now I need to create date range as from-order-date and to-order-date in 2 separate list box by using orderDate field. And also need sum(orderAmount) when customer select from-order-date and to-order-date from those list boxes.

orderDate	orderAmount
1/1/2015	1000
14/2/2015	4500
31/3/2015	200
30/4/2015	800
14/6/2015	3500

Anyone please provide video or process step by step.

[#2]

I have QV personal edition. Can you give any video, so that I can understand this answer.