Chapter 7 WORKING WITH VIEWS 425 tinue to
Chapter 7 WORKING WITH VIEWS 425 tinue to be visible through the view. User View Member Tables User Access View of Instances of SQL Server The next sections examine two more major areas of views. Before attempting to deal with partitioned views, you should be comfortable with the topics covered thus far. If not, review them one more time. The other area that is covered is using views to control data access and ownership chains. ALTER DATABASE OBJECTS TO SUPPORT PARTITIONED VIEWS . Alter database objects to support partitioned views. A partitioned view combines horizontally partitioned data from member tables across one or more servers (distributed partitioned views). A member table can be thought of as a segment from a larger table. There are two types of partitioned views in SQL Server: a local partitioned view and a distributed partitioned view. A local partitioned view is a partitioned view where all member tables reside on the local instance of SQL Server. Distributed partitioned views are new to SQL Server 2000 and are a bit more advanced than local partitioned views. The key difference between a distributed partitioned view and a local partitioned view is that in a local partitioned view, the data is collected from a single server alone. In contrast, a distributed partitioned view collects data from two or NOTE Defining Union All UNION ALL specifies that multiple queries are to be combined into a single resultset. The ALL argument specifies that all rows be incorporated, even duplicate value rows. If ALL isn t specified, duplicate values are removed.
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