Mssql on vista

If the character after an escape character isn't a wildcard character, the escape character is discarded and the following character is treated as a regular character in the pattern. The following example finds all telephone numbers that have area code in the PersonPhone table. The following example finds all telephone numbers in the PersonPhone table that have area codes other than The following example finds employees on the Person table with the first name of Cheryl or Sheryl.

The following example finds the rows for employees in the Person table with last names of Zheng or Zhang. The following example finds all employees in the DimEmployee table with telephone numbers that start with The following example finds all telephone numbers in the DimEmployee table that don't start with The following example finds all telephone numbers that have an area code starting with 6 and ending in 2 in the DimEmployee table.

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Privacy policy. This article describes how to create indexes on a view. The first index created on a view must be a unique clustered index.

After the unique clustered index has been created, you can create more nonclustered indexes. Creating a unique clustered index on a view improves query performance because the view is stored in the database in the same way a table with a clustered index is stored.

The query optimizer may use indexed views to speed up the query execution. The view does not have to be referenced in the query for the optimizer to consider that view for a substitution. The following steps are required to create an indexed view and are critical to the successful implementation of the indexed view:.

When executing DML 1 on a table referenced by a large number of indexed views, or fewer but very complex indexed views, those referenced indexed views will have to be updated as well.

As a result, DML query performance can degrade significantly, or in some cases, a query plan cannot even be produced. Evaluating the same expression can produce different results in the Database Engine when different SET options are active when the query is executed.

To make sure that the views can be maintained correctly and return consistent results, indexed views require fixed values for several SET options. The SET options in the following table must be set to the values shown in the Required Value column whenever the following conditions occur:. The definition of an indexed view must be deterministic.

Deterministic expressions always return the same result any time they are evaluated with a specific set of input values. Only deterministic functions can participate in deterministic expressions. For example, the DATEADD function is deterministic because it always returns the same result for any given set of argument values for its three parameters.

GETDATE is not deterministic because it is always invoked with the same argument, but the value it returns changes each time it is executed.

This means the column is not deterministic or not precise. Indexed views can dramatically improve the performance of some types of queries. Indexed views work best for queries that aggregate many rows. They are not well-suited for underlying data sets that are frequently updated. Partitioned Views A partitioned view joins horizontally partitioned data from a set of member tables across one or more servers.

This makes the data appear as if from one table. A view that joins member tables on the same instance of SQL Server is a local partitioned view. System Views System views expose catalog metadata.

You can use system views to return information about the instance of SQL Server or the objects defined in the instance. For example, you can query the sys. Skip to main content.

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