How do I create a materialized view log in Oracle?

How do I create a materialized view log in Oracle?

CREATE MATERIALIZED VIEW LOG ON tableName [WITH [PRIMARY KEY][,ROWID]|[ROWID][,PRIMARY KEY] [(columnName[,…])]] List of columns for which changes will be recorded in the log. Use the WITH clause to indicate the keys and columns for which changes will be recorded in the materialized view log.

How do you create a materialized view?

Create a materialized view to perform the aggregation in advance, making sure you specify the ENABLE QUERY REWRITE clause. CREATE MATERIALIZED VIEW emp_aggr_mv BUILD IMMEDIATE REFRESH FORCE ON DEMAND ENABLE QUERY REWRITE AS SELECT deptno, SUM(sal) AS sal_by_dept FROM emp GROUP BY deptno; EXEC DBMS_STATS.

What is Rowid materialized view?

A ROWID materialized view is based on the physical row identifiers (rowids) of the rows in a master. ROWID materialized views can be used for materialized views based on master tables that do not have a primary key, or for materialized views that do not include all primary key columns of the master tables.

How do I create a materialized view in Oracle?

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.

Can we create index on materialized view in Oracle?

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.

How can create materialized view in SQL Server with example?

Materialized views in Microsoft SQL Server

1. select p. ProductID, sum(t.
2. from Production. TransactionHistory t inner join Production.
3. select p. ProductID, sum(t.
4. from Production. TransactionHistory t inner join Production.
5. create unique clustered index TotalCostQuantityByProduct on v_TotalCostQuantityByProduct (ProductID)

Can we create materialized view on a view?

Creating a materialized view requires CREATE MATERIALIZED VIEW privilege on the schema, and SELECT privilege on the base table. CREATE [ MATERIALIZED ] VIEW produces an error if a table with the same name already exists in the schema.

How do I make a materialized view on a prebuilt table?

SQL> create table my_objects as select object_name, object_type, created from user_objects; Table created. SQL> create materialized view my_objects on prebuilt table as select object_name, object_type, created from user_objects; Materialized view created.

How do I create an updatable materialized view in Oracle?

Steps to Setup Updatable Materialized View:

1. Setup Master Site.
2. Setup Materialized View Site.
3. Configure Master Refresh Group.
4. Configure Materialized view refresh Group.
5. Test the Replication of updatable materialized view.

Can we create index on materialized views?

How do you automate a materialized view refresh?

Set the initialization parameters and bounce the database. Create the materialized view table. Here, we specify that the materialized view will be refreshed every two hours with the refresh fast option. Instead of using DBMS_MVIEW, you can automatically refresh the MVIEW (Snapshot) using Oracle DBMS_JOB Management.

How do I create a materialized view in SQL?

Like a view in Materialized views in SQL we are using simple select statement to create it….Materialized views in SQL Syntax and Examples:

1. Build Immediate: Means materialized views(mv) created immediately.
2. Build Deferred: Means materialized views(mv) created after one refresh.
3. Refresh on commit:
4. Refresh on Demand:

Can we use create or replace materialized view?

No, we can’t use create or replace option with materialised voews. To replace such views we must drop them first and recreate them.

What is materialize hint in Oracle?

Note the use of the Oracle undocumented materialize hint in the WITH clause. The Oracle materialize hint is used to ensure that the Oracle CBO materializes the temporary tables that are created inside the WITH clause, and its opposite is the undocumented inline hint.

Is rowid unique in Oracle?

Each row in an Oracle database has a unique row identifier, or rowid. A ROWID is an 18-digit number that is represented as a base-64 number. ROWID is used internally by the Oracle database to access the row. ROWID is only used internally by the database.

Can I rename a materialized view?

RENAME TO new_name This option allows you to rename a materialized view. The new identifier must be unique for the schema in which the view is created. The new identifier must start with an alphabetic character and cannot contain spaces or special characters unless the entire identifier string is enclosed in double quotes (e.g.