SQL Query Or SP? Order Value Between Two Dates

Hi all,

Been having a good root around the forums and the site here and there's some real smart people on here, i'm hoping one or more of them can help me out. I'm expecting this to be a simple question for some of you, however it's way beyond me at this point!

Table Structure (abridged, relevant columns):

Orders:

Code:

[Orders](
[OrderID] [int] IDENTITY(1,1)
[OrderDateTime] [datetime]
[OrderSiteID] [nvarchar](255)
[OrderOffline] [bit]
[OrderSentToWP] [bit]
[OrderReceivedFromWP] [bit]
[OrderAuthorised] [bit]
[OrderCancelled] [bit]
[OrderApproved] [bit]
[OrderFraud] [bit]
[OrderDispatched] [bit]


OrderItems:

Code:

[OrderItems](
[OrderID] [int]
[ProductID] [nvarchar](255)
[Quantity] [int]
[Price] [real]
[Weight] [real]


Products:

Code:

[Products](
[ProductID] [uniqueidentifier]
[ProductCode] [nvarchar](255)
[ProductTitle] [nvarchar](255)



Product price is captured at time of order, so that reports aren't affected by discounts or promotions, and stored with the productid in orderitems.

I want to get a report between a set of dates and with certain flags set (see below example) and then get a list of unique products, quantity sold and sales values for that products. Results table would have 4 columns; ProductCode, ProductTitle, QuantitySold, Sales Value.

So far I have this:

Code:

SELECT Products.ProductCode, Products.ProductTitle, SUM(OrderItems.Quantity) AS QuantitySold
FROM Orders INNER JOIN
OrderItems ON Orders.OrderID = OrderItems.OrderID INNER JOIN
Products ON OrderItems.ProductID = Products.ProductID
WHERE (Orders.OrderDateTime BETWEEN '2007/01/01' AND '2007/12/31') AND
(Orders.OrderSentToWP = 1) AND (Orders.OrderReceivedFromWP = 1) AND (Orders.OrderAuthorised = 1) AND (Orders.OrderCancelled = 0) AND
(Orders.OrderDispatched = 1) AND (Orders.OrderApproved = 1) AND (Orders.OrderFraud = 0) AND Orders.OrderSiteID= 'someguid'
GROUP BY Products.ProductCode, Products.ProductTitle



Which gets my summed quantities, and I guess I could use ASP to multiply that by the current price, but that defeats the point of setting the database up properly in the first place! I know how to design data, i just don't know how to get it back out again

I could most likely just do the whole thing in ASP and get it to output the correct answer, so if it's impossible/very difficult to do it in pure SQL then I'll go that route. Ideal situation would be a stored proc or saved query that I can pass a start date, an end date and a siteid to and that will get me the answers I want!

Thanks in advance to anyone that looks at this for me.

Also, any recommended books/sites to learn this kind of query?

Richard