When a materializedview is fast refreshed, Oracle must examine all of the changes to the mastertable or master materialized view since the last refresh to see if any apply tothe materialized view. Therefore, if any changes were made to the master sincethe last refresh, then a materialized vie...
When a materializedview is fast refreshed, Oracle must examine all of the changes to the mastertable or master materialized view since the last refresh to see if any apply tothe materialized view. Therefore, if any changes were made to the master sincethe last refresh, then a materialized vie...
Oracle Database Data Warehousing Guide for information about the prerequisites that apply to creating data warehousing materialized views Syntax create_materialized_view::= Description of the illustration create_materialized_view.eps (scoped_table_ref_constraint::=, physical_properties::=, materialized...
Um eine materialisierte Ansicht zu erstellen, musst du die CREATE MATERIALIZED VIEW Syntax verwenden, die sich in den verschiedenen SQL-Datenbanken leicht unterscheidet. Die folgenden Methoden zeigen, wie man materialisierte Ansichten in SQL Server, PostgreSQL und Oracle erstellt. Materialisierte Ans...
Theparallel_clauselets you change the default degree of parallelism for the materialized view. Note: The syntax of theparallel_clausesupersedes syntax appearing in earlier releases of Oracle. Superseded syntax is still supported for backward compatibility, but may result in slightly different behavior th...
For information about federated query, see Querying data with federated queries in Amazon Redshift. Syntax CREATE MATERIALIZED VIEW mv_name [ BACKUP { YES | NO } ] [ table_attributes ] [ AUTO REFRESH { YES | NO } ] AS query Parameters BACKUP A clause that specifies whether the ...
Note how both the old and the new values are stored in the same column, VAL. The OLD_NEW$$ column identifies the value as either an old or a new value. Gotcha - Commas The syntax diagrams for theCREATE MATERIALIZED VIEW LOGcommand indicate a comma is required between each component of ...
To evaluate this option, measure the performance and execution time of your SQL. For more information, see CREATE TABLE Statement, Trigger Syntax and Examples, and CREATE VIEW Statement in the MySQL documentation. Document Conventions Oracle JSON document support and MySQL JSON...
CREATE MATERIALIZED VIEW Doesn’t Exist In MySQL But, there is no MySQL syntax for creating materialized views. You cannot say CREATE MATERIALIZED VIEW `user_stats` AS SELECT * FROM `DB-1`.USERS WHERE ... UNION SELECT * FROM `DB-2`.USERS WHERE ... UNION ... There are no materialized...
You have theCREATE TABLEprivilege, and theSELECTprivilege on the base table. For more information about privileges in OceanBase Database, seePrivilege types in Oracle mode. Syntax The syntax for creating a materialized view log is as follows: ...