How do I create a materialized view log?

How do I create a materialized view log?

Oracle Database creates the materialized view log in the schema of its master table. You cannot create a materialized view log for a table in the schema of the user SYS . Specify the name of the master table for which the materialized view log is to be created.

What are materialized view logs?

In an Oracle database, a materialized view log is a table associated with the master table of a materialized view. When master table data undergoes DML changes (such as INSERT, UPDATE, or DELETE), the Oracle database stores rows describing those changes in the materialized view log.

How do you make a materialized view without data?

insert into demo_mv select * from demo_source; Now we convert it from a regular table into an MV: create materialized view demo_mv on prebuilt table as select * from demo_source; Now DEMO_MV is a materialized view.

Where can I find Mview logs?

all_mview_logs will show you all the materialized view logs that you have access to. user_mview_logs will show you all the materialized view logs that you own.

Is there a way to create a materialized view log?

If you own the master table, then you can create an associated materialized view log if you have the CREATE TABLE privilege.

How does materialized view work in Oracle Database?

This guarantees that the master table data and materialized view data are in sync throughout the refresh process. This refresh method is useful in data warehousing environments. Without a materialized view log, Oracle Database must reexecute the materialized view query to refresh the materialized view.

Which is an example of 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. Collectively these objects are called master tables (a replication term) or detail tables (a data warehousing term).

When to use on prebuilt table in materialized view?

The ON PREBUILT TABLE clause lets you register an existing table as a preinitialized materialized view. This clause is particularly useful for registering large materialized views in a data warehousing environment. The table must have the same name and be in the same schema as the resulting materialized view.