Updating a materialized view in oracle Free online sex cam without registration and payment
In contrast, in a normal view, it's typically only possible to exploit indexes on columns that come directly from (or have a mapping to) indexed columns in the base tables; often this functionality is not offered at all.
You can perform manual refreshes in addition to automatic refreshes as explained in my earlier article (Materialized Views).
This procedure refreshes all materialized views, which were defined using the automatic refreshes.
A materialized view is a database object that contains the results of a query.
Materialized views find use especially in data warehousing scenarios, where frequent queries of the actual base tables can be expensive.
Collectively these objects are called master tables (a replication term) or detail tables (a data warehousing term).
In computing, a materialized view is a database object that contains the results of a query.
For example, it may be a local copy of data located remotely, or may be a subset of the rows and/or columns of a table or join result, or may be a summary using an aggregate function.
They are created with the for update clause during creation without then adding the materialized view to a materialized view group.
In such a case, the materialized view is updatable, but the changes are lost when the materialized view refreshes.