When a materializedview is fast refreshed, Oracle must examine all of the changes to the mastertable or master materialized view since the last refresh to see if any apply tothe materialized view. Therefore, if any changes were made to the master sincethe last refresh, then a materialized vie...
WITH PRIMARY KEY is used to create a primary key materialized view i.e. the materialized view is based on the primary key of the master table instead of ROWID (for ROWID clause). PRIMARY KEY is the default option. To use the PRIMARY KEY clause you should have defined PRIMARY KEY on the...
When a materializedview is fast refreshed, Oracle must examine all of the changes to the mastertable or master materialized view since the last refresh to see if any apply tothe materialized view. Therefore, if any changes were made to the master sincethe last refresh, then a materialized vie...
When you create a materialized view, Oracle Database creates one internal table and at least one index, and may create one view, all in the schema of the materialized view. Oracle Database uses these objects to maintain the materialized view data. You must have the privileges necessary to cr...
Materialized View Concepts Oracle usesmaterialized views(also known as snapshots in prior releases) to replicate data to non-master sites in a replication environment and to cache expensive queries in a data warehouse environment. This chapter, and thisOracle9i Replicationmanual in general, discusses ma...
For example, to answer the previous question, a materialized view would contain one row for every product, by region with the quantity sold. Therefore if a company sold 2000 products in 5 locations, the maximum number of rows to be read would always be 10 000, irrespective of how many ...
With the introduction of Oracle Real-time Materialized View, it should be a good choice to store pre-aggregated data in Materialized View, and let MicroStrategy be aware of the MV as a physical aggregate table. In this setup, Oracle will be able to maintain the availability of the Materializ...
For the first case Oracle will raise an error if you try to create such a materialized view with its refresh method defaulted to REFRESH FAST. In the example below table T does not have a materialized view log on it. Materialized views based on T cannot therefore be fast refreshed. If we...
Created a Materialized View in ORACLE which won't refresh Ask Question Asked 4 years, 10 months ago Modified 2 months ago Viewed 1k times Report this ad1 I created a materialized view log along with a materialized view called update_nboe based on table NBOE_ EMPLOYEES_TEST using the follo...
The DDL syntax is consistent with PostgreSQL and Oracle. Create materialized views First, you need to decide what kind of materialized view to create according to the characteristics of your query statement. That is not to say, however, that it is best that your materialized view definition is...