Azure 資料倉儲中具體化檢視類似 SQL Server 中的索引檢視表。 它的限制幾乎與索引檢視表相同 (請參閱建立索引檢視表以取得詳資訊),不過具體化檢視支援彙總函式。 注意 雖然CREATE MATERIALIZED VIEW 不支援 COUNT、DISTINCT、COUNT(DISTINCT 運算式) 或 COUNT_BIG (DI
CREATE MATERIALIZED VIEW AS SELECT (Transact-SQL) ALTER MATERIALIZED VIEW (Transact-SQL) EXPLAIN (Transact-SQL) sys.pdw_materialized_view_column_distribution_properties (Transact-SQL) sys.pdw_materialized_view_distribution_properties (Transact-SQL) ...
You can create an index on a view, but that is very rarely a good idea.","kudosSumWeight":0,"repliesCount":0,"postTime":"2023-10-10T22:05:31.133-07:00","images":{"__typename":"AssociatedImageConnection","edges":[],"totalCount":0,"pageInfo":{"__typename":"PageInfo","has...
A Materialized View (MV) is a database object that precomputes and stores the result of a SQL query, akin to a summary table. Note that a summary is typically an aggregate query; however, materialized views can be created for any query—for example, one just involving a join. In this ...
create materialized view V1 with(distribution=hash(a)) as select a, b from dbo.t group by a, b; -- Clear all cache. DBCC DROPCLEANBUFFERS; DBCC freeproccache; -- Check the estimated execution plan in SQL Server Management Studio. It shows the SELECT query is first step (GET operator)...
In the SQL statement example for creating a materialized view,CREATE MATERIALIZED VIEWxxxWITH(xxx) ASis omitted. For details about the complete statement template, seeTable 1. Table 2Example of materialized view rewriting scenarios Scenario Description ...
In the SQL Commander, you can create a materialized view similar to a regular view but with the `CREATE MATERIALIZED VIEW` syntax. For example, Copy 1 CREATE MATERIALIZED VIEW sample_materialized_view AS 2 SELECT column1, column2 3 FROM your_table 4 WHERE conditions; Using the SQL commande...
Example syntax tocreate a materialized view in oracle: CREATEMATERIALIZEDVIEWMV_MY_VIEW REFRESH FASTSTARTWITHSYSDATE NEXTSYSDATE+1 ASSELECT*FROM; Oracle usesmaterialized views to replicate data to non-master sites in a replication environmentand to cache expensive queries in a data warehouse environment...
The owner of the materialized view must have theCREATETABLEsystem privilege. The owner must also have access to any master tables of the materialized view that the schema owner does not own (for example, if the master tables are on a remote database) and to any materialized view logs define...
Whenever you create a materialized view, regardless of its type, always specify the schema name of the table owner in the query for the materialized view. For example, consider the followingCREATEMATERIALIZEDVIEWstatement: CREATE MATERIALIZED VIEW hr.employeesAS SELECT * FROM hr.employees@orc1.world...