Views can also be used when you copy data to and from SQL Server to improve performance and to partition data.Types of viewsBesides the standard role of basic user-defined views, SQL Server provides the following types of views that serve special purposes in a database....
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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 views An indexed view is a materialized view. This means the view definition has been computed and the resulting data stored just like a ...
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 views An indexed view is a materialized view. This means the view definition has been computed and the resulting data stored just like a ...
SQL Server 视图 Views 视图可以简单地理解成一张虚拟表。实际上,视图就是将我们的一组相对比较复杂的 SQL 查询定义成一个视图,一个虚拟表。 当我们会频繁地用到某一个查询结果的时候,不需要重新编写查询语句,只要调用储存好的视图,就能得到结果。 SQL Server 在视图中,也可以对于数据进行维护,例如把身份证号、...
要防止数据库引擎使用索引视图,请在查询中包含OPTION (EXPAND VIEWS)提示。 此外,任何所列选项设置不正确,此选项均会阻止优化器使用视图上的索引。 有关OPTION (EXPAND VIEWS)提示的更多信息,请参阅SELECT。 其他注意事项 索引视图中列的large_value_types_out_of_row选项设置继承基表中相应列的设置。 此值是使用...
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editions of SQL Server. On SQL Server Standard edition, you must use theNOEXPANDquery hint to query the indexed view directly. Azure SQL Database and Azure SQL Managed Instance support automatic use of indexed views without specifying theNOEXPANDhint. For more information, seeTable Hints (Transact...
Common Language Runtime (CLR) types. A major new feature of SQL Server 2005 is support for user-defined types (UDTs) and user-defined functions based on the CLR. Indexed views can be defined on CLR UDT columns, or expressions derived from those columns, provided that the columns or express...
Views can also be used when you copy data to and from SQL Server to improve performance and to partition data.Types of viewsBesides the standard role of basic user-defined views, SQL Server provides the following types of views that serve special purposes in a database....