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Updatable materialized view description1. updatable materialized views must belong to a materialized view group.2. the updatable materialized view is always based on a single table, alt
In-depth research on the materialized view (mview) of Oracle 4 Now, when you move a base table in the first article, you will find that you cannot refresh the table quickly. You must refresh all the tables as follows: SQL> ALTER TABLE t_mvlog move; Table altered. SQL> exec dbms_mview.refresh ('mv
1. Even if you are disconnected from the primary site or the primary materialized view site, you can query and update datasets that have been copied to the local site (dataset ). 2. Requirements for replication over multiple master sites 1. Even if you are disconnected from the primary site or the primary materialized view
to "userid" identified by "password" using "(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP) (HOST = "ipaddress") (PORT = 1521) (CONNECT_DATA = (SERVICE_NAME = "SID ")))'; create database link dblink_to_A connect to "userid" identified by "password" using '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP) (HOST = "ipaddress ") (PORT = 1521) (CONNECT_DATA = (SERVICE_NAME = "SID") '; 3. create Materialized
The new requirement for Oracle DBLinke + Materialized View to synchronize data projects of two databases is to synchronize some of the two Oracle databases. Several methods are available in the experiment environment, today, we will record how DbLink and the materialized view synchronize data. 1. Configure the tnsnames
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 creation statement SQL> @ F: \ oracle \ product \ 1
rowid RID, A. tname, A. tabtype,A. clusterid from t_mvtest; Next, add a column to the table. SQL> ALTER TABLE t_mvtest add col4 varchar2 (20 ); Table altered. Next, we will completely refresh the two materialized views to see the running situation: SQL> exec dbms_mview.refresh ('mv _ test_star ', 'complete ');Begin dbms_mview.refresh ('mv _ test_star ', 'complete'); end; *E
the network alias ts12tj in tnsnames. ora to connect to 81 Create a database chain Conn ts12_st/ts12_st_2010 Create database link DBLINK_SNAP_QUERY Connect to snap_query identified by snap_query Using 'ts12tj '; Test: Select event_id, test1YPE From userb. test1 @ DBLINK_SNAP_QUERY where rownum Create Materialized View Create materialized
One of the in-depth studies of Oracle's Materialized View (mview) One of the in-depth studies of Oracle's Materialized View (mview) Go to anysql.net A materialized view is provided from Oracle 8i to Improve the access speed of ap
We used the Oracle materialized view incremental refresh mechanism to synchronize the data of a table on database A to another database B on a regular basis. The simplest implementation step we often use is this. First, confirm on database A that the table has a primary key, and then build on this table to establish material
,t.container_name from dba_summaries t where owner= ' YYF123 ';No rows selectedSql>create materialized VIEW EMPOn prebuilt TABLEREFRESH Force on DEMANDSTART with sysdate NEXT sysdate + 10/1442AsSELECT * from [email Protected]_to_scott;Materialized view created.Sql> Select COUNT (*) from EMP;COUNT (*)----------14sql> ex
Tags: int new ref rate tables Ora operation Postgre fontThe materialized view appears after PostgreSQL 9.3. Materialized views are made up of real data, which is fundamentally different from the general view. 1. The materialized view
Materialized View and task scheduling data synchronization 1. materialized view (materialized view) www.2cto.com create materialized view TE
Today, someone asked me a materialized view query rewrite problem, finally found that the problem and materialized view of the function is not much relationship, but the implicit conversion caused by the problem. Let's illustrate the problem by example: Sql> CREATE TABLE T ( 2 ID number, 3 time Date, 4 other VARCH
Create | error | resolve | view Nightly test materialized view replication, the master site in the test environment is ORACLE10G,MV site is Oracle9201, and when creating a quick-refreshed materialized view on MV site, the report ORA-600 error. Sql> CREATE
ALTER event ' MyEvent ' On completion PRESERVE ENABLE; --Closes ALTER EVENT ' myevent ' on completion PRESERVE DISABLE; MySQL does not start the event by default, so you need to modify your My.ini or my.cnf[mysqld] to add the following as Downlink Event_scheduler=1 Three simulated materialized views 1) First build a base table. SQL code CREATE TABLE ' user ' ( ' Id ' int () NOT NULL auto_increment, ' name ' varchar (2
, (because this is a problem that can be solved by the view), found that the common view in fact with the establishment of a few tables of the connection relationship statement to query is the basic same time consumption.Later asked about the existence of materialized views, Oracle itself is also supporting materialized
The refresh of materialized views is actually not fundamentally different from normal SQL execution, so you can customize the refresh operation by creating triggers on materialized views. Just two days ago, someone asked me on the blog, if you add a timestamp column to the materia
Tags: blog HTTP ar OS use SP strong data onCloud Computing Design Model (14)-Materialized View Mode Data is formatted in the opinion that data is pre-filled in one or more data storages, which is not conducive to the required query operations. This mode can help you efficiently query and extract data and improve application performance.Background and Problems When data is stored, developers and data adminis
System) Grant create materialized view to database; Part 2: run the table_name table command to issue the command Create materialized view log on table_name with primary key; Part 3: establish a connection in our own database (the following command) Create materialized
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