Can we create materialized view on other materialized view?

Can we create materialized view on other materialized view?

Use the CREATE MATERIALIZED VIEW statement to create a materialized view. A materialized view is a database object that contains the results of a query. The FROM clause of the query can name tables, views, and other materialized views. You can select data from a materialized view as you would from a table or view.

Can we create materialized view on multiple tables?

– Materialized view logs must exist with rowids for all the base tables in the FROM list of the query. – You cannot create a fast refreshable materialized view from multiple tables with simple joins that include an object type column in the SELECT statement.

Can we create materialized view log on a view?

Use the CREATE MATERIALIZED VIEW LOG statement to create a materialized view log, which is a table associated with the master table of a materialized view. Note: The keyword SNAPSHOT is supported in place of MATERIALIZED VIEW for backward compatibility.

Can we Index materialized view?

A materialized view can be partitioned, and you can define a materialized view on a partitioned table. You can also define one or more indexes on the materialized view. Unlike indexes, materialized views can be accessed directly using a SELECT statement.

Can we use joins in materialized view?

A materialized view can query only a single table. Joins, including self-joins, are not supported. A materialized view cannot query: A materialized view.

Can I rename a materialized view?

Such materialized views can be queried but can’t be refreshed. In this case, you must drop and recreate the materialized view. In general, you can’t alter a materialized view’s definition (its SQL statement). You can’t rename a materialized view.

How to implement materialized views in MySQL?

Creation of mat-views functions and data dictionary. Create the mat-view table (data dictionary).

What is Oracle material view?

A materialized view in Oracle is a database object that contains the results of a query. It stores data physically and get updated periodically.