Alibabacloud.com offers a wide variety of articles about oracle create materialized view, easily find your oracle create materialized view information here online.
Often listen to the students of Oracle materialized view, one of the functions of materialized view is that you can implement query rewriting, it sounds like a tall feeling, SQL Server also has the function similar to Oracle
, COL1 varchar), COL2 varchar ($), COL3 VARCHAR (+), COL4 varchar (+), COL5 varchar, PRIMARY KEY (ID)) ORGANIZE by ROW;Create a tableCREATE TABLE t_mqt (ID, COL1, COL2, COL3) as (select ID, COL1, COL2, COL3 from T) DATA initially DEFERRED REFRESH IMMEDIATE maintained by SYSTEM; SET INTEGRITY for T_MQT IMMEDIATE CHECKED full ACCESS;Write data to the original tableINSERT into
Create a primary key in the oracle view and a primary key in the oracle View A project requires a view to create a primary key. The following is an example.
(1) materialized view SQL Server does not have the concept of materialized views, but instead uses indexed views instead (refer to: https://msdn.microsoft.com/zh-cn/library/ms191432.aspx and https:// msdn.microsoft.com/zh-cn/library/aa290257%28vs.71%29.aspx), the materialized view
generally we need to pass ODBC or dump out. But because PG supports external tables (Fdw,dblink). By creating a data that we need in Oracle, you can create an external table and then create a materialized view of the external table, which will also reduce the copy of the da
oracle| View Materialized views in Oracle A materialized view is a database pair that includes a query result, which is a local copy of the remote data, or is used to generate a summary table based on the sum of the data tables
. The materialized view of Oracle is a database pair image that includes a query result, which is a local copy of the remote data, or is used to generate a summary table based on the sum of the data tables. Materialized views store data based on remote tables and can also be referred to as snapshots.Materialized views
There is a project because there are more query summaries, considering the speed, so the materialized view is used. Simply put the used to the next to tidy up. First look at the simple Create statement: Create materialized view m
next ).AsSelect distinct user_noFrom cw_arrearage tWhere (T. Mon = dbms_tianjin.getlastmonth orT. Mon = add_months (dbms_tianjin.getlastmonth,-1 ))Delete Materialized View:Drop materialized view an_user_base_file_no_charge;These are common syntaxes used to create a materialized
In real work, there will be multiple data sources synchronized to a database to complete the data analysis of the scene, the data can not be synchronized in real-time, we generally through the scheduled task of extracting data to the statistical analysis library for the application to use.The general synchronization method can be done through the time stamp to do the full and incremental data synchronization (there is the possibility of the original data changes, data inconsistency), can also be
In Oracle, jobs regularly execute stored procedures to refresh the materialized view and record exceptions (My materialized view cannot be refreshed by myself) In Oracle, jobs regularly execute stored procedures to refresh the
Problem Description: When creating a view under Scott's user, error: Insufficient permissions. (Other users, etc.) Workaround : Log on as a DBA user [SQL] Copy Code code as follows: Sqlplus/as SYSDBA Give Scott user permission to create view [SQL] Copy Code code as follows: Grant CREATE
Oracle distinguishes materialized views from tables before 9i at the beginning of 10g. Many functions do not distinguish between tables and materialized views. After 10g. Many features differentiate tables from materialized views. The common comment on table statement is no longer valid for
Oracle jobs regularly execute stored procedures to refresh materialized views and record exceptions In Oracle, jobs regularly execute stored procedures to refresh the materialized view and record exceptions (My materialized
, the data does not comply with the current materialized view specification, so the error of ORA-01400 is reported. 5. solution: The Oracle function NVL is referenced here. The usage is as follows: NULL indicates a NULL value or an invalid value. NVL (expr1, expr2): If expr1 is NULL, expr2 is returned. If not NULL, expr1 is returned. Note that the two types must
,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 CO
Table synchronization can be implemented using materialized views, can be the same library or can be different databases for data synchronization, it is recommended that data synchronization in the same library can use real-time synchronization, if using the DB link is recommended to use incremental refresh, to prevent Dblink caused the performance of the original library dropped sharply.Main steps:1. Creating mat
When refresh fast on demand is used to incrementally refresh the materialized view, the conventional creation step is to first create the materialized view log on the source database, and then create the
view----Create materialized View statements:(2). Create Materializad view syntax in statisticsCreate materialized View Mv_test----Mvtest fo
view----Create materialized View statements:(2). Create Materializad view syntax in statisticsCreate materialized View Mv_test----Mvtest fo
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
