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<h1>"GetCategories" Stored Procedure</h1>
<b>Description:</b>
<P>
This stored procedure returns a monthly regional sales figure for the specified
year and quarter parameters.</P>
<P>The idea of a cross-tab query is to transform a set of relational data to a
compact summarized spreadsheet-like view. In this case, the task is to sum
monthly sales figure based on the employee regional location.</P>
<P>To calculate monthly regional sales, notice in the inner SQL statement, the CASE
keyword is used to sum the sales of each region, and month is used as the GROUP
BY criteria. Using the regional result, the outer SQL statement calculate the
monthly sales total.</P>
<b>Definition:</b>
<pre>
CREATE PROCEDURE Reports_GetSalesByRegion
(
@Year int,
@Quarter int
)
AS
Select
*, TotalMonth = Eastern + Western + Northern + Southern
From
(
Select DatePart(month, OrderDate) MonthOfSales,
Sum(Case RegionID When 1 Then (UnitPrice * Quantity ) Else 0 End) As Eastern,
Sum(Case RegionID When 2 Then (UnitPrice * Quantity ) Else 0 End) As Western,
Sum(Case RegionID When 3 Then (UnitPrice * Quantity ) Else 0 End) As Northern,
Sum(Case RegionID When 4 Then (UnitPrice * Quantity ) Else 0 End) As Southern
From Reports_Orders O
Inner Join Reports_Territories T On O.TerritoryID = T.TerritoryID
Inner Join [Reports_Order Details] OD On O.OrderID = OD.OrderID
Where Year(OrderDate) = @Year And DatePart(q, OrderDate) = @Quarter
Group By DatePart(month, OrderDate)
) As T
Order By MonthOfSales
</pre>
<b>SQL Schema: </b>
<p>
<img src="./images/1x1.gif" width="25"> <IMG src="./images/xtabsql.png"></p>
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