SQL Server “materializes” the data in the view into physical table so instead of doing complex joins, aggregates, etc, it can queries the data from
so,. let close it with MS web site words 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...
数据库中的视图(view)是从一张或多张数据库表查询导出的虚拟表,反映基础表中数据的变化,且本身不存储数据。 2、物化视图【materialized view】 2.1、概念:物化视图是查询结果集的一份持久化存储,所以它与普通视图完全不同,而非常趋近于表。可以是基础表中部分数据的一份简单拷贝,也可以是多表join之后产 生的结果...
SQL Copy -- Create a materialized view if it doesn't exist > CREATE MATERIALIZED VIEW IF NOT EXISTS subscribed_movies AS SELECT mo.member_id, mb.full_name, mo.movie_title FROM movies AS mo INNER JOIN members AS mb ON mo.member_id = mb.id; -- Create and schedule a mater...
To create a materialized view, use the CREATE MATERIALIZED VIEW statement. To submit a create statement, use the SQL editor in the Azure Databricks UI, the Databricks SQL CLI, or the Databricks SQL API.Piezīme The user who creates a materialized view is the materialized view owner and needs...
数据库中的视图(view)是从一张或多张数据库表查询导出的虚拟表,反映基础表中数据的变化,且本身不存储数据。 2、物化视图【materialized view】 2.1、概念:物化视图是查询结果集的一份持久化存储,所以它与普通视图完全不同,而非常趋近于表。 可以是基础表中部分数据的一份简单拷贝,也可以是多表join之后产 生的结...
Materialized views are prewritten queries with joins and filters whose definition is saved and the results persisted to a dedicated SQL pool. They are not supported by default in serverless SQL pools. Materialized views results in increased performance since the data w...
Abstract DynaMat: A Dynamic View Management System for Data Warehouses Data Warehouses - Kotidis, Roussopoulos - 1999 () Citation Context ...ented in thisspaper are the foundation of a robust physical databasesdesign tool for Microsoft SQL Server 2000 that cansrecommend both indexes and materi...
To support efficient querying, a common solution is to generate, in advance, a view that materializes the data in a format most suited to the required results set. The Materialized View pattern describes generating prepopulated views of data in environments where the source data is not in a fo...
任务在每晚使用这个 SQL 语句更新该统计信息: REFRESH MATERIALIZED VIEW sales_summary; CREATE MATERIALIZED VIEW 定义一个新的物化视图 CREATE MATERIALIZED VIEW [ IF NOT EXISTS ] table_name [ (column_name [, ...] ) ] [ WITH ( storage_parameter [= value] [, ... ] ) ] ...