My application task is i am going to develop one super market application in this scenario. The user enter product code and user description
start date and end date. product rate and quantity. my question is product rate based on date in varies rates .
we will get soap this product 15th October to Nov 7th Rs.20/-. The same product Nov 8th between Dec Rs.23/- The same product change for
Dec 15th Between Jan 12th Rs.19/- . How design database for this application and how to write class and method for this application.