在SQL Server中索引视图跟物化视图(materialized View)有点类似。索引视图的最大好处是可以物化一个大表的摘要合计 (materialize summary aggregates of a large table),例如,考虑到一个customer表包含几百万行美国的顾客,而你想要统计每个州的相关信息。你可以创建一个基于Group by查询的视图,通常的视图是一个空名...
Besides the standard role of basic user-defined views, SQL Server provides the following types of views that serve special purposes in a database.Indexed viewsAn indexed view is a materialized view. This means the view definition has been computed and the resulting data stored just like a ...
SQL Server 2008允许你在结果数据类型是otherwise indexable的、确定的、精确的(包括persisted imprecise)计算列上创建索引。这句不太理解,原文是SQL Server 2008 allow you to build indexes on deterministic,precise(and persisted imprecise)computeredcolumns where the resulting data type is otherwise indexable. 这...
0 SQL Server cannot create indexed view 5 Error when creating view - [dbo].[someFunction] is not schema bound 3 Error adding an index to a view 1 Cannot create indexed view 16 Cannot create index on view because the view is not schema bound error 1939 0 Unable to Create Indexe...
(So it will work with an SQL Server Indexed View.) FYI: Not sure if it matters, but my specific query has over 10 levels of my xml tree (pulled from a bunch of different tables). sql-server sql-server-2012 xml materialized-view Share Improve this question Follow edited Apr 24,...
An indexed view is a view that is physically stored like a table. The indexed view is updated by SQL Server when any of the tables that the indexed view is based on are updated. This has the added benefit of pulling I/O away from the main tables and indexes....
sql-server materialized-view union cache Share Improve this question Follow edited Apr 27, 2020 at 21:21 asked Apr 27, 2020 at 21:14 Cowthulhu 27711 silver badge88 bronze badges Add a comment 1 Answer Sorted by: 2 I could create a cache table and manually load it any time the...
How the Query Optimizer Uses Indexed Views The SQL Server query optimizer automatically determines when an indexed view can be used for a given query execution. The view does not need to be referenced directly in the query for the optimizer to use it in the query execution plan. Therefore, ...
48. What is a materialized view? Materialized views is also a view but are disk based. Materialized views get updated on specific duration, base upon the interval specified in the query definition. We can index materialized view. 49. What are the advantages and disadvantages of views in a da...
When SQL Server 2017 came out, that’s how I unmasked snapshot materialized views, a hidden feature that sadly never got enabled. The official “What’s New in SQL Server 2019” lists a lot of stuff, but there’s even more they haven’t talked about yet. Here are the new messages...