Contents
Does materialized view store data?
A materialized view is a pre-computed data set derived from a query specification (the SELECT in the view definition) and stored for later use. Because the data is pre-computed, querying a materialized view is faster than executing a query against the base table of the view.
Is data available during materialized view refresh?
Refreshes a materialized view. When you create a materialized view, its contents reflect the state of the underlying database table or tables at that time. The data in the materialized view remains unchanged, even when applications make changes to the data in the underlying tables.
How do you refresh data in materialized view?
Materialized views can be refreshed in two ways: fast or complete. A fast refresh requires having a materialized view log on the source tables that keeps track of all changes since the last refresh, so any new refresh only has changed (updated, new, deleted) data applied to the MV.
How do you trigger a materialized view?
create or replace TRIGGER REFRESH_REST_VIEW AFTER INSERT OR UPDATE ON tbl_contract BEGIN execute DBMS_MVIEW. REFRESH(‘REST_VIEW’); END REFRESH_REST_VIEW; commit; This is my sql trigger i am using to refresh Materialized View.
Can a table be created with a materialized view?
A materialized view cannot reference other views. A materialized view can’t be created on a table with dynamic data masking (DDM), even if the DDM column is not part of the materialized view. If a table column is part of an active materialized view or a disabled materialized view, DDM can’t be added to this column.
How to re-enable the materialized view in azure?
To re-enable the materialized view, run ALTER MATERIALIZED VIEW with REBUILD. A materialized view in Azure data warehouse is similar to an indexed view in SQL Server. It shares almost the same restrictions as indexed view (see Create Indexed Views for details) except that a materialized view supports aggregate functions.
Which is better materialized view or base view?
Although materialized view logs improve the performance of materialized view refreshes, they do increase the work needed to perform DML on the base table. Check the additional work does not adversely affect performance on the primary system.
How to create a materialized view in synapse analytics?
This article explains the CREATE MATERIALIZED VIEW AS SELECT T-SQL statement in Azure Synapse Analytics for developing solutions. The article also provides code examples. A Materialized View persists the data returned from the view definition query and automatically gets updated as data changes in the underlying tables.