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{Query statements for creating materialized views}
These are common syntaxes used to create a
In-depth research on the materialized view (mview) of Oracle III
In-depth research on the materialized view (mview) of Oracle III
Author: anysql.net. During reprinting, please mark it as a hyperlink
Article Original Source and author information.
Link: http://www.anysql.net/oracle/star_in_mview.html
When cre
How to synchronize two databases in Oracle (using the materialized view) (oracle snapshot instance) I. Technical implementation details unless otherwise specified, the following SQL commands are run under the SYSETM user of the database ora_db2. Assume that you want to copy (or synchronize) all user db1 tables in database ora_db1 on the other server. 1. Create a database connection (dblink) 1.1 used to conn
Incremental synchronization of data in two databases
Oracle Database IP Address: 192.168.0.1 (source database), 192.168.0.2 (target database)
1. Create a TEST table in the source database
Create table TEST
(
Id number not null,
NAME VARCHAR2 (200)
);
create table TEST( ID NUMBER not null, NAME VARCHAR2(200));
2. Insert a data entry
Insert into test (ID, NAME) VALUES (1, '20140901 ');
Commit;
INSERT INTO TEST(ID,NAME) VALUES (1,'1111');commit;
3. Create a
When writing a report, you need a table in another database to operate (table_name). However, during the operation, this table has a large field (clob. Use s
When writing a report, you need a table in another database to operate (table_name). However, during the operation, this table has a large field (clob. Use s
When writing a report today, you need a table in another database to operate (table_name). However, during the operation, this table has a large field (clob. No query is available
Create a recurring incremental refresh materialized view
1, in the source library to establish a synchronized table materialized view log:
create materialized View
Build a Test tableCREATE TABLE T_table nologging as SELECT * from Dba_objects;create table T_table_1 nologging as SELECT * from Dba_tables;--Create a log recordCreate materialized view Log on t_table with ROWID, sequence (Object_name,object_type,owner) including new Values;create MA terialized
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 materialized view and automatically maintain
Oracle dblinke+ materialized view the new requirement of synchronizing data items for two databases is to synchronize parts of the two Oracle databases, and now try several methods in the experimental environment, and then record the Dblink and materialized views synchronized data today. 1, configure the Tnsnames.ora file designated to the main database network
)
1.3 Modifying Tnsnames.ora files
The main site and materialized view site in the Tnsnames.ora parameter files are added below, note that you need to modify the host's IP address, as well as the service_name value, port generally defaults to 1521.
MAIN =
(DESCRIPTION =
(Address_list =
(address = (PROTOCOL = TCP) (HOST = 19.168.2.105) (PORT = 1521))
)
(Connect_data =
(service_name = portal)
)
)
database by accessing multiple databases.
Build a distribution environment: Distribute data to multiple node databases by distributing them from a central database.
Copy a subset of data: MV can be filtered at row-level/column-level so that you can replicate the part of the data you need.
Support Offline Computing: MV does not require a dedicated database connection, and users can replicate the part of the data they need to their needs.
Refresh of Mview:Oracle supports three mo
In query rewrite, we can see that this technology is inseparable from one thing, the materialized view, mview for short. this is the first Technology launched by Oracle in 8i. In addition to using query rewrite, mview also plays an important role in master-slave replication, here we are mainly concerned about query rewrite. Oracle is getting stronger and stronger in query rewrite. in Oracle 8i, it is basica
ensured. 3. The database trigger is used to implement the materialized view. The advantage is that data synchronization is provided to the DB to ensure that the application does not need to pay attention to the view. If the trigger fails to be executed, the corresponding source table operations will also be rolled back, and the development of the corresponding t
materialized view. The advantage is that data synchronization is provided to the dB to ensure that the application does not need to pay attention to the view. If the trigger fails to be executed, the corresponding source table operations will also be rolled back, and the development of the corresponding trigger program is insufficient. This article mainly descri
Two Oracle 10g databases to synchronize data with materialized views in a specific implementation process
Source Library is 192.168.1.81
Target Library is 192.168.1.96
The server used for the statistics library is 81
Create a read-only user snap_query on the Statistics Gallery 81 for querying
Conn/as SYSDBA
Create user snap_query identified by snap_query
Default Tablespace users
Temporary tablespace temp;
Grant connect to Snap_query;
Gr
In the materialized view test manual, the view is an SQL statement that requires two-way data synchronization when data changes are small and data needs to be used twice, the execution plan must be re-generated and re-executed for each query.
In the materialized view test ma
Tags: art limited to_date zed LIS creat rom Upper testI. Creating a remote materialized view log SOURCE side: CREATE materialized VIEW LOG on Tozwdb.test tablespace tozwdb_data with ROWID; Ii. Rights of payment Target Library Crea
Create/drop/alter View
Create View
Drop View
Alter View Properties
Alter View as Select
Version InformationIconView support was only available in Hive 0.6 and
Tags: error row option top names led INF CEP guaranteeRecently colleagues in the handover work, found that there are several schedule job did not succeed, I looked at the next, one is due to the database migration, call Dblink host IP in TNSNames no change caused, there is no view of the error, that is, the error message is as follows: First, error log By viewing the Schedual job error
How to recover the Delete/update data
Operation Steps
1 db connected to the deleted database
Open Log Explorer Select "File"-> "Attach log File"-> Select server and login mode-> "Connect"-> Select "Database"-> "Attach"
2 View Log
In the dialog box on the left action item, select the Browse item-> "
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