创建物化视图需要有 CREATE TABLE 权限。更多有关 OceanBase 数据库权限的详细介绍,请参见 Oracle 模式下的权限分类。语法CREATE MATERIALIZED VIEW view_name [column_list] [table_option_list] [partition_option] [refresh_clause] AS view_select_stmt; column_list: (column_name [, column_name ...]) ...
In the past, organizations using summaries spent a significant amount of time and effort creating summaries manually, identifying which summaries to create, indexing the summaries, updating them, and advising their users on which ones to use. With the advent of materialized views, a database admini...
complex queries. *Action:Reissue the command with the REFRESH FORCE or REFRESH COMPLETE option or create a simple materialized view. 数据库版本: BANNER --- Oracle Database 11g Enterprise EditionRelease 11.2.0.1.0 - 64bit Production PL/SQL Release 11.2.0.1.0 - Production CORE11.2.0.1.0Productio...
Q 题目 在Oracle数据库中,哪个后台进程刷新物化视图(materialized views)? A 答案 答案:Oracle数据库使用Job Queue进程去运行用户的Jobs,经常在批量模式下。任务是用户自定义的预订运行一次或者多次的作业。比如说,可以使用一个Job队列去安排在后台运行的一个长时间运行的更新任务。给定一个开始时间和间隔时间,任务队列...
Oracle Database uses these objects to maintain the materialized view data. You must have the privileges necessary to create these objects. You can create the following types of local materialized views (including both ON COMMIT and ON DEMAND) on master tables with commit SCN-based materialized ...
Oracle Materialized Views (MVs) are designed for data warehousing and replication. For data warehousing, MVs based on inner/outer equi- joins with optional aggregation, can be refreshed on transaction boundaries, on demand, or periodically. Refreshes are optimized for bulk loads and can use a mult...
Materialized Views may be refreshed in the same manner used for Snapshots allowing summarization to occur with a frequency that meets the needs of the user community. By including CUBE andROLLUP in a Materialized View along with other GROUP BY results, more complete information is available for ...
Uncover the power of PostgreSQL materialized view in this guide. Dive deep into optimization techniques and master the art of refreshing materialized views.
With AWS DMS, you can create and manage materialized views in Oracle and PostgreSQL databases to improve query performance and enable efficient data access. A materialized view is a database object that stores a pre-computed result set from a query, providing fast access...
INTRODUCTION Materialized views were first introduced in Oracle8i and they are part of a component known as Summary Management. Your organization may already be using a materialized view, but may know it by another name, such as a summary or aggregate table. Here we will discuss how ...