what is use of materialized view in oracle

defaults to force and demand. Note: The materialized view that sets the refresh on commit does not have access to the remote object. When you create a materialized view, you can specify an order by statement to keep the resulting data in a certain sequence. However, this statement

Recently, I have seen some articles about Oracle materialized views, which are integrated and detailed for memo: The previous version of MaterializedView is called SNAPSHOT ), renamed The Materialized View From 9i. In fact, both snapshots and

materialized views are managed together with tables, in PLSQL tools that are frequently used, you cannot delete a table by deleting it. (You cannot right-click the table and select 'drop' to delete the materialized view.) You can use the following statement to delete the table: drop

. materialized views occupy storage space. materialized views should also be refreshed when the base table changes.For example, how to create a table space is hardly described in other materialized views. I mainly use an example. If you have a clear understanding of the basi

ORACLE materialized view and oracle Materialized View In the last few days, I have provided a View to the W System in the P project environment. Due to the complicated query logic and l

materialized views. Materialized views can be partitioned. and partitioned materialized views can support zoning change tracking (PCT). Materialized views with this feature can still be entered when the base table is partitioned for maintenance operationsRow Quick refresh o

DBMS_MVIEW.EXPLAIN_MVIEW can analyze three different materialized view codes:1. defined query 2. a create materialized view Statement 3. An existing MATERIALIZED VIEWThe procedure is as follows: www.2cto.com1. Run the table creati

(' mv_emp_pk ', ' C ');--Full Volume refresh PL/SQL procedure Successfully completed. [Email protected]>exec dbms_mview.refresh (' mv_emp_pk ', ' f ');--Fast Refresh PL/SQL procedure successfully completed.(2) Use Dbms_refresh.refresh process to batch refresh MVIf we specify the refresh time for start and next when we create the materialized view,

016-09-27 14:36:09,802 ERROR [500.jsp]-Could not commit JDBC transaction; Nested exception is java.sql.sqlexception:ora-12048: Refreshes the materialized view "the". Check_form "Error ORA-12034: "Teenagers". The materialized view log on Ch_task

Tags: force entity fetch number Save time existence comm Simple aggregation/*Oracle materialized View*//*Why use materialized views?Materialized views are widely used as a means of SQL tuning in a data warehouse environment.A larg

The materialized view aims to save some queries that take a long time to obtain results in advance, save the results of these queries to a local copy, and then query the results later, you can query data from the materialized view without querying some remote data tables. This improves the query performance. Create

called a master table (during replication) or a schedule (in a data warehouse ).For replication, materialized views allow you to locally maintain copies of remote data, which are read-only. To modify a local copy, you must use the advanced copy function. When you want to extract data from a table or view, you can extract data from the

needed. The default value is build immediate. (2) QueryRewrite: Includes enable query rewrite and disable query rewrite. Specify whether the created materialized view supports query rewriting. Query Rewriting means that when you query the base table of the materialized view