Azure 資料倉儲中具體化檢視類似 SQL Server 中的索引檢視表。 它的限制幾乎與索引檢視表相同 (請參閱建立索引檢視表以取得詳資訊),不過具體化檢視支援彙總函式。 注意 雖然CREATE MATERIALIZED VIEW 不支援 COUNT、DISTINCT、COUNT(DISTINCT 運算式) 或 COUNT_BIG (DI
How to create Materialized view in SQL ServerRegards, tgvr"},"Conversation:conversation:3950639":{"__typename":"Conversation","id":"conversation:3950639","solved":false,"topic":{"__ref":"ForumTopicMessage:message:3950639"},"lastPostingActivityTime":"2023-10-10T22:05:31.133-07:00","las...
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...
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
Azure 数据仓库中的具体化视图与 SQL Server 中的索引视图相似。 除了具体化视图支持聚合函数外,它与索引视图适用的限制几乎相同(请参阅创建索引视图了解详细信息)。 备注 尽管CREATE MATERIALIZED VIEW 不支持 COUNT、DISTINCT、COUNT(DISTINCT expression) 或 COUNT_BIG (DISTINCT expression),但具有这些函...
Materialized View在ClickHouse中的作用是什么? 如何实现从MySQL到ClickHouse的实时数据同步? 本篇演示使用 ClickHouse 的 MaterializeMySQL 数据库引擎和物化视图,实时将 MySQL 库表中的数据同步到ClickHouse 的库表中。相关软件版本如下: MySQL:8.0.16 ClickHouse:24.1.8 这种方案的好处是操作简单,几乎不需要额外配置即可...
In subject area: Computer Science A Materialized View is a database object that stores the precomputed results of a SQL query, similar to a summary table, allowing for quick data retrieval and analysis in data warehousing applications. AI generated definition based on: Oracle 10g Data Warehousing...
SQL Server 2000支持物化视图,由于视图可通过不同组合的索引实现,也称为索引视图。为确保视图支持增量更新,SQL Server要求物化视图必须包含唯一键(unique key),本文中聚合函数仅考虑sum 和count 算子。 代码语言:sql AI代码解释 --创建物化视图示例 create view v1 with schemabinding as select p_partkey, p_name...
CREATEMATERIALIZEDVIEWdept_30 BUILD IMMEDIATEASSELECT*FROMempWHEREdeptno=30; The view contains information retrieved from theemptable about any employee that works in department30. ← Prev CREATE INDEX ↑ Up Compatible SQL commands Next → CREATE PACKAGE...
通过案例学调优之--跨库建立物化视图(Materialized View) 应用环境: 操作系统: RedHat EL55 Oracle: Oracle 10gR2 一、物化视图概述 Oracle的物化视图是包括一个查询结果的数据库对像,它是远程数据的的本地副本,或者用来生成基于数据表求和的汇总表。物化视图存储基于远程表的数据,也可以称为快照。