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...
If the materialized view has remote tables in theFROMclause, all tables in theFROMclause must be located on that same site. Further,ON COMMITrefresh is not supported for materialized view with remote tables. Except for SCN-based materialized view logs, materialized view logs must be present on ...
Materialized View 1)creation 1@@@create a table for a sql statement @@@original sql statement sql> set linesize 200 sql> conn sh/sh sql> ed SELECT c.cust_id , SUM(amount_sold) FROM sales s , customers c WHERE s.cust_id=c.cust_id GROUP...
Oracle Database Utilitiesfor information on using direct loader logs Prerequisites The privileges required to create a materialized view log directly relate to the privileges necessary to create the underlying objects associated with a materialized view log. ...
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...
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...
In Oracle, for example, you can create a materialized view using the following syntax: CREATE MATERIALIZED VIEW view_name BUILD IMMEDIATE REFRESH FAST ON COMMIT AS SELECT column1, column2, ... FROM table1 JOIN table2 WHERE condition; In this syntax, "view_name" is the name of the materia...
The following example creates a materialized view from three base tables that are joined and aggregated. Each row represents a category with the number of tickets sold. When you query the tickets_mv materialized view, you directly access the precomputed data in the tickets_mv materialized view. ...