SQL Server Execution Plans - Red Gate Software

Chapter 4: Understanding More Complex Query Plans
…
@AccountNumber NVARCHAR(15) = 'SPEEDCO0001',
…
Listing 4.10
…the exact same query with the exact same execution plan will now UPDATE the data
for values where the AccountNumber is equal to that passed through the parameter.
Therefore, this plan, and the Merge operator, creates a single reusable plan for all the data
manipulation operations it supports.
Views
A view is essentially just a "stored query," in other words, a logical way of representing
data as if it were in a table, without actually creating a new table. The various uses of
views are well documented (preventing certain columns from being selected, reducing
complexity for end-users, and so on). Here, we will just focus on what happens within an
execution plan when working with a view.
Standard views
The view, Sales.vIndividualCustomer, provides a summary of customer data,
displaying information such as their name, email address, physical address and
demographic information. A very simple query to get a specific customer would look
something like Listing 4.11.
SELECT *
FROM Sales.vIndividualCustomer
WHERE BusinessEntityId = 8743;
Listing 4.11
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