Beginning Microsoft SQL Server 2008 ... - S3 Tech Training

Chapter 10: Views
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soh.SalesOrderID,
soh.OrderDate,
sod.ProductID,
pp.Name,
sod.OrderQty,
sod.UnitPrice,
sod.UnitPriceDiscount * sod.UnitPrice * sod.OrderQty AS TotalDiscount,
sod.LineTotal
FROM Sales.Customer AS sc
INNER JOIN Sales.SalesOrderHeader AS soh
ON sc.CustomerID = soh.CustomerID
INNER JOIN Sales.SalesOrderDetail AS sod
ON soh.SalesOrderID = sod.SalesOrderID
INNER JOIN Production.Product AS pp
ON sod.ProductID = pp.ProductID;
Now do a SELECT:
SELECT *
FROM CustomerOrders_vw;
You wind up with a bunch of rows — over 121,000 — but you also wind up with information that is far
simpler for the average manager to comprehend and sort out. What’s more, with not that much training,
the manager (or whoever the user might be) can get right to the heart of what they are looking for:
SELECT AccountNumber, LineTotal
FROM CustomerOrders_vw
WHERE OrderDate = ‘01/07/2002’;
The user didn’t need to know how to do a four-table join — that was hidden in the view. Instead, they
only need limited skill (and limited imagination for that matter) in order to get the job done.
AccountNumber LineTotal
------------- ---------------------------------------
AW00014937 3578.270000
AW00018710 3578.270000
AW00025713 699.098200
AW00020558 699.098200
(4 row(s) affected)
However, we could make our query even more targeted. Let’s say that we only want our view to return
yesterday’s sales. We’ll make only slight changes to our query:
USE AdventureWorks2008
GO
CREATE VIEW YesterdaysOrders_vw
AS
SELECT sc.AccountNumber,
soh.SalesOrderID,