SQL Server Execution Plans - Red Gate Software

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Listing 4.1
Chapter 4: Understanding More Complex Query Plans
FROM [Sales].[SalesTaxRate] st
JOIN [Person].[StateProvince] sp
ON [st].[StateProvinceID] = [sp].[StateProvinceID]
WHERE [sp].[CountryRegionCode] = @CountryRegionCode
ORDER BY [StateName] ;
Which we can then execute:
EXEC [Sales].[spTaxRateByState] @CountryRegionCode = 'US';
Listing 4.2
The resulting actual execution plan is quite simple, as shown in Figure 4.1.
Figure 4.1
Starting from the right, we see a Clustered Index Scan operator, which gets the list of tax
rates. The query combines this data with data pulled from the States table, based on
the parameter, @CountryRegionCode, visible in the ToolTip or the Properties window,
through a Nested Loops operation.
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