When a materializedview is fast refreshed, Oracle must examine all of the changes to the mastertable or master materialized view since the last refresh to see if any apply tothe materialized view. Therefore, if any changes were made to the master sincethe last refresh, then a materialized vie...
For replication purposes, materialized views allow you to maintain copies of remote data on your local node. These copies are read-only. If you want to update the local copies, you have to use the Advanced Replication feature. You can select data from a materialized view as you would from ...
When a materializedview is fast refreshed, Oracle must examine all of the changes to the mastertable or master materialized view since the last refresh to see if any apply tothe materialized view. Therefore, if any changes were made to the master sincethe last refresh, then a materialized vie...
If the materialized view has remote tables in theFROMclause, all tables in theFROMclause must be located on that same site. Further,ON COMMITrefresh is not supported for materialized view with remote tables. Except for SCN-based materialized view logs, materialized view logs must be present on ...
我们将对这些活跃表创建 materialized view log,以实现首次全量数据加载,后续增量刷新的功能,而其它“静态表”及对象则在停机窗口中借助数据泵导入。步骤如下: 源– 统计有效数据为创建新 RDS Oracle 实例作参考 目标 – 创建新实例,创建表空间 目标 – 导入活跃表(metadata only) 源– 给活跃表创...
Oracle-Materialized View解读 物化视图概述 物化视图(Materialized View)在9i以前的版本叫做快照(SNAPSHOT),从9i开始改名叫做物化视图。 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。 物化视图可以用于预先计算并保存表连接或聚集等耗时较多的操作的...
When attempting to refresh a materialized view on an Oracle VDB, the following errors are encountered: BEGIN DBMS_MVIEW.REFRESH('VDB123_OCN_TO_EPM.MVIC_PS_HIER_PRD'); END; * ERROR at line 1: ORA-12008: error in materialized view or zonemap refresh pat...
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。 物化视图可以用于预先计算并保存表连接或聚集等耗时较多的操作的结果,这样,在执行查询时,就可以避免进行这些耗...
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 在复制环境下,创建的物化视图通常情况下主键,rowid和子查询视图。 物化视图由于是物理真实存在的,故可以创建索引。 二、物化视图刷新 ...
Oracle Create or Replace Materialized Views A materialized view in Oracle is a database object that contains the results of a query. It is a replica of a target master table or master materialized view, which isrefreshed periodically to keep the data consistent. By storing the computed results...