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...
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 (DISTINCT 運算式),但使用這些函數...
Materialized View - A materialized view takes a different approach in which the query result is cached as a concrete table that may be updated from the original base tables from time to time. This enables much more efficient access, at the cost of some data being potentially out-of-date. ...
In addition, usingread-only materialized views eliminates the possibility of a materialized viewintroducing data conflicts at the master site or master materialized view site,although this convenience means that updates cannot be made at the remotematerialized view site. The following is an example of ...
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) ...
Transact-SQL 语法约定语法syntaxsql 复制 ALTER MATERIALIZED VIEW [ schema_name . ] view_name { REBUILD | DISABLE } [;] 备注 Azure Synapse Analytics 中的无服务器 SQL 池不支持此语法。参数schema_name 视图所属架构的名称。view_name 是要更改的具体化视图。
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...
2@@@create a materialized view for that sql statement sql> conn sh/sh sql> ed CREATE MATERIALIZED VIEW cust_sales_mv ENABLE QUERY REWRITE AS SELECT c.cust_id , SUM(amount_sold) AS amount FROM sales s, customers c WHERE s.cust_id=c.cust_id GROUP...
Materialized views can be used in a number of ways and almost identical syntax can be used to perform a number of roles. For example, a materialized view can be used to replicate data, which was formerly achieved by using the CREATE SNAPSHOT command. Now CREATE MATERIALIZED VIEW is a synon...
You have created a user for accessing the HetuEngine web UI, for example, Hetu_user. For details, see Creating a HetuEngine Permission Role. Enabling Materialized View Recommendation Log in to FusionInsight Manager as user Hetu_user. Choose Cluster > Services > HetuEngine and then choose Configurat...