Materialized views - 物化视图,不实时查询表,定期更新,查询速度快 视图的更新频率我们可以在这看到:select * from dba_jobs , 一般在创建视图的时候完成的. 也可以在 sql developer的scheduler里查看: Synonyms  - 别名,有些时候可以用于dblink查询其他数据库的表来定义成本地表名一样 CREATE OR REPLACE PUBLIC SYNONYM "XXX" FOR "<SCHEMA>…

aterialized views are disk based and update periodically base upon the query definition. Views are virtual only and run the query definition each time they are accessed. Views evaluate the data in the tables underlying the view definition at the time…

Thanks to MS sql could have materialized views ,similar with oracle MVs, using indexed views. what is going on ? are they same thing ? Here we go : (1) general demo tables and rows /****************************************************AboutSQLServer.c…

Oracle Dynamic Performance ViewsVersion 12.2.0.1 https://www.morganslibrary.org/reference/dyn_perf_view.html General Information Library Note Coming to OpenWorld 2018? Be sure to visit the TidalScale booth in Moscone South and learn how to solve perf…

Materialized Views 物化视图 -基础篇 http://blog.csdn.net/elimago/article/details/5404019…

One characteristic of time-series data workloads is that the dataset will grow very quickly. Without the proper data infrastructure, these large data volumes can cause slowdowns in primarily two areas: inserting the data into the database, and aggreg…

标记一下,慢慢看  http://www.oracle-base.com/articles/misc/articles-misc.php Miscellaneous Articles DBA Development Middleware Application Express (APEX) MySQL Operating System Installations Oracle VM Others DBA AutoNumber And Identity Functionality - Implem…

List all of MV inoracle: select owner, query, query_len from dba_mviews See content of aMV: select *from dba_mviewswhere owner='CNTL_DATA' A materialized viewis a database object that contains the results of a query. For example, it maybe a local cop…

在工作中我遇到过这样的一个问题,就是当我需要将远程主机上Oracle数据中某个表的数据copy到本地Oracle时,有多种方法可以实现.1.将所需要的数据导出到csv或其他格式的文档,复制到本地进行直接导入:2.在本地数据库中创建DBLink,通过使用DBLink来进行复制数据. create database link LinkToDB connect to scott identified by tiger using '(DESCRIPTION = (ADDRESS = (PROTOCOL…

目 录 目             录...3 1      说明...3 2      导出dmp文件...3 3      导入dmp文件...5 3.1            环境准备...5 3.2            执行导入...6 1        说明 dmp文件为oracle数据库的数据备份文件,执行oracle数据库导出dmp文件,相当于执行数据库备份:执行导入dmp文件,相当于数据库还原. 2        导出dmp文件 在dos控制台下执行如下指令: su -orac…