Alibabacloud.com offers a wide variety of articles about oracle create materialized view, easily find your oracle create materialized view information here online.
commit means that once the base COMMIT, that is, the transaction is committed, the materialized view is refreshed immediately, and the data and the base table are consistent. The materialized view created by ORACLE is in the on demand mode by default.E: \> sqlplus "/as sysd
simplest way, similar to a normal view, so it inevitably involves a default value problem. This means that the default value of Oracle's important definition parameters for materialized views is something we need to pay special attention to. Features of materialized views: (1) Materialized
Label:If we encounter the need to take data from the database of other systems for statistical analysis, the suspect chooses to use ORACLE 's ODI tool for the number of votes, but the other side of the database provided by the user does not have any objects, just have to query all the table permissions, so the data can not be reversed. So decided to use materialized vie
to the other database.
2. Create an Oracle Materialized View to quickly refresh logs
As mentioned above, the view refresh method will be incremental in the future. Therefore, in combination with incremental refresh, ORACLE requir
If we encounter the need to take data from the database of other systems for statistical analysis, the suspect chooses to use ORACLE 's ODI tool for the number of votes, but the other side of the database provided by the user does not have any objects, just have to query all the table permissions, so the data can not be reversed.So decided to use materialized view
Db_linkCREATE DATABASE LINK to_cpeesCONNECT to 'username ' identified by "password" Using "cpees"Where Cpees is the new TNS to the other database. Execution, now we have created the Db_link to_cpees to the other database.2. Create materialized view to refresh log quicklyAs mentioned above, the refresh of the view will
read the data. The default is disable QUERY REWRITE.When you create a materialized view, you can specify an order BY statement so that the resulting data is saved in a certain order. NoThis statement is not written to the definition of the materialized view and is not valid
which columns are to be stored (into the log). Typically, these columns are filtered or concatenated columns.Limitations of the WITH statement:1) Each materialized view log can only be set to one primary Key,rowid,object Id,sequcen, as well as the column list, or the WITH statement after these keywords can only be the last, cannot these with primary key, primary key2) The primary key column is already impl
I. Problem description a project team calls and says there is a materialized view with more than 20 thousand entries in the source table, which is refreshed every 5 minutes, this causes a sudden increase in Oracle Database archive logs. Ii. Problem Analysis and Solution first, clarify the relationship between Archive Log and REDO Log.
Tags: order must be upd submit effective and ant ext also needPossible causes for Oracle materialized view refresh failure: 1. View does not establish materialized view log 2. The base table is authorized to the user 1.
database.
2. Create materialized view Quick Refresh Log
Because it says, the refresh of the view will take the form of incremental refresh, so in order to keep up with incremental refreshes, Oracle requires that the materialized
. Create an index on the target materialized view
[SQL] View plaincopy
CREATE INDEX idx_t_dv_ct
On Aics_dev_info (Create_time, Update_time)
Tablespace BISON_IDX;
CREATE INDEX Idx_t_dv_ut
On Aics_dev_info (Update_time)
Table
the specified time, to generate data)Next: refresh cycle time
Iii. instance demonstration (two host operations, master table host and materialized view host)1. Create a tablespace (master table machine operation)Create tablespace TEST_view datafile '/home/oracle/oradata/orc
Materialized view: A special view with physical storage, just like a Table object. Materialized views and tables can be queried directly. It is one of the effective methods to optimize the query performance and improve the efficiency of the system, which is the function of the distributed query through the read-write s
START with sysdate NEXT sysdate+1/24/60 and PRIMARY KEY as SELECT * from KAMUS.T1;
Check the User_refresh view and the User_jobs view, we can find the start with ... next ... The syntax is that Oracle automatically creates a refresh group with the same name as the materialized vie
of this object. Toad may call this a snapshot snapshots). However, this is annoying, the materialized view written on PLSQL Developer cannot be distinguished in Toad. It seems that both of them are sufficient.Materialized views have the attributes of views. They are based on real tables, which reveal data in real tables in general, and even create almost the sam
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 O
11. materialized view log management the materialized view log is a table that maintains the history of operations on the materialized view. To create a
Create | view | site
Objective: To create a materialized view site that refreshes periodically to obtain changes to the specified table in the main site, which can be used as a query server
Steps:
1. To create a
There are many ways to synchronize tables between Oracle databases, such as triggers, MaterializedView (MV), Stream, and Goldengate. MaterializedVi
There are many ways to synchronize tables between Oracle databases, such as triggers, Materialized View (MV), Stream, and Goldengate.
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.