Listing 2 creates a view based on our query definition, as shown in Listing 2. However, you can create a unique clustered index on the view – referred to as an indexed view – to persist the data on disk. This is an important new feature in SQL Server 2000. Having a unique clustered index on the view greatly simplifies the implementation details. create or replace view emp_dept_view. This index can then be used for reads, reducing the amount of I/O.
It don't have any data of its own. When the underlying tables of the view are modified, the clustered […] An indexed view is simply another view that creates its physical existence on the disk by creating a unique clustered index on one or more columns used in the view.
as. Create a Unique, Clustered Index.
Learn how to create an indexed view in SQL Server 2000 in this book excerpt from MCAD/MCSD/MCSE Training Guide (70-229): SQL Server 2000 Database Design and Implementation. Creating an indexed view is a two-step process: Create the view using the CREATE VIEW statement with the SCHEMABINDING clause. View is just a stored SELECT statement. You can significantly improve performance by creating a unique clustered index on a view that involves complex processing of large quantities of data, such as aggregating or joining many rows. The index of a view can be used even if the view is not explicitly referenced in the FROM clause. Second, create a unique clustered index on the view. This materializes the view. If you replicate base tables and then create an indexed view, replication performance decreases. There are some limitations to indexed views , but when you can create one and it improves performance, it really improves performance. SQL Server uses a system of delta algebra to keep indexed views in step with the base data. Probably the most important property of indexed views is that a query does not have to explicitly reference a view to use the index on that view. 2. Replicating Indexed Views as tables, instead of replicating all base tables and then creating an indexed view against those base tables, allows for a smaller subset of data to be replicated over. select * from emp_dept_view The SELECT statement of emp_dept_view is executed.
Sometimes it can greatly improve performance especially if the underlying tables are located in different databases. If you have a view like. Indexed Views. Creating an Indexed View.
1. Some tips for using indexed views in SQL Server 2016 Consider creating two or more smaller views instead of creating a single large indexed view.