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

❑ Encrypt views when you don’t want others to be able to see your source code — either for commercial
products or general security reasons, but also remember to keep a copy of your unencrypted
code; it can’t be retrieved after you’ve encrypted it.
❑ Using an ALTER VIEW completely replaces the existing view other than permissions. This
means you must include the WITH ENCRYPTION and WITH CHECK OPTION clauses in the ALTER
statement if you want encryption and restrictions to be in effect in the altered view.
❑ Use sp_helptext to display the supporting code for a view — avoid using the system tables.
❑ Minimize the user of views for production queries — they add additional overhead and hurt
performance.
Common uses for views include:
❑ Filtering rows
❑ Protecting sensitive data
❑ Reducing database complexity
❑ Abstracting multiple physical databases into one logical database
Chapter 10: Views
In our next chapter, we’ll take a look at batches and scripting. Batches and scripting will lead us right
into stored procedures — the closest thing that SQL Server has to its own programs.
Exercises
1. Add a view called HumanResources.Managers in the AdventureWorks2008 database that
shows only employees that supervise other employees.
2. Change the view you just created to be encrypted.
3. Build an index against your new view based on the ManagerID and EmployeeID columns.
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