This is a discussion on "display mean and variance of purchased items" within the Other Programming Languages section. This forum, and the thread "display mean and variance of purchased items are both part of the Program Your Website category.
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display mean and variance of purchased items
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Mar 12th, 2006, 00:19
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display mean and variance of purchased items
Hi
i am trying to create a program using WML, WMLSCRIPT, AND JSP. The task is to create a website to be displayed in the WAP Browser. In the website for a company called 'BargainBook' that sells books and the ERD diagram for this is attached as picture (see attachement). So now I have just finished creating a login and register page and nearly done on purchase page BUT what I want to do is to find out how to display the MEAN and VARIANCE of purchased books in a given period of time (let say 1 week for example) . Plus how can I extend my ER Diagram in order to add this because I think I may need a separate entity (or table) for this. Any explanation will be very much appreciated. Specifically, as I said, I think need a new table for this BUT I do not know what kind of record should be stored on it that would help with the calculation. And also, I would like to know the suitable SQL queries to calculate the mean and variance for a given period of time. thanks 
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Nov 4th, 2006, 21:10
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Re: display mean and variance of purchased items
If you message me with a bit more detail i'll help you through it.
THANKS ANDY!!! - teesside website design - website design in teesside -
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