Asked by: Miledys Furnari
asked in category: General Last Updated: 2nd February, 2020

What is the use of materialized view in Oracle?

A materialized view in Oracle is a database object that contains the results of a query. They are local copies of data located remotely, or are used to create summary tables based on aggregations of a table's data. Materialized views, which store data based on remote tables are also, know as snapshots.

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Similarly, it is asked, why do we use materialized view in Oracle?

Materialized views are basically used to increase query performance since it contains results of a query. They should be used for reporting instead of a table for a faster execution.

Secondly, what is difference between view and materialized view? The basic difference between View and Materialized View is that Views are not stored physically on the disk. However, Materialized View is a physical copy, picture or snapshot of the base table. A view is always updated as the query creating View executes each time the View is used.

Consequently, what is the advantage of materialized view in Oracle?

the big advantage of a Materialized View is extremely fast retrieval of aggregate data, since it is precomputed and stored, at the expense of insert/update/delete. The database will keep the Materialized View in sync with the real data, no need to re-invent the wheel, let the database do it for you.

What is materialized view with example?

Materialized View Real Life Example: When user creates materialized view then one table structure is created and user directly fetches that data from that table structure. Suppose there are 2 tables named Employee and Department. The Employee table contains 1 million records and department table contains 20 records.

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