You can use materialized views in all SQL syntax. Sample statement: SELECT * FROM adbview WHERE device = 'PC' AND city = 'Beijing'; Note When you perform queries by using materialized views, base tables referenced by the materialized views may be updated, but the upd...
Erstellen einer materialisierten Ansicht in SQL 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, ...
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...
Confirm and execute the action in the pop-up window. Confirm drop materialized view dialogue box. 3. Refreshing a Materialized View Materialized views capture a static snapshot of a query result. However, when the underlying data changes, these views become outdated. To update them with the lat...
若要详细了解如何计划刷新,请参阅示例或ALTER MATERIALIZED VIEW。 具体化视图只能使用 Pro 或无服务器 SQL 仓库创建或在 Delta Live Tables 管道中创建。 备注 无服务器 Delta Live Tables 管道支持对具体化视图和流式处理表进行的创建和刷新操作。 可以使用目录资源管理器在 UI 中查看有关支持管道的详细...
Your workspace must be in a region that supportsserverless SQL warehouses. You must have accepted the serverlessterms of use. To querymaterialized views: You must be the owner of thematerialized view, or haveSELECTon thematerialized view, along withUSE SCHEMAandUSE CATALOGon its parents. ...
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...
Using the SQL commander to create a view. Over time, as the underlying data changes, you'll want to refresh your materialized view. Use the following command in DbVisualizer's SQL Commander: Copy 1REFRESH MATERIALIZEDVIEWsample_materialized_view; ...
Syntax create_materialized_view::= Description of the illustration create_materialized_view.eps (scoped_table_ref_constraint::=, physical_properties::=, materialized_view_props::=, physical_attributes_clause::=, create_mv_refresh::=, evaluation_edition_clause::=, query_rewrite_clause::=, subq...
In other words, any base tables or related columns referenced in the defining SQL query of the materialized view must exist and must be valid. Leader node-only functions: CURRENT_SCHEMA, CURRENT_SCHEMAS, HAS_DATABASE_PRIVILEGE, HAS_SCHEMA_PRIVILEGE, HAS_TABLE_PRIVILEGE. You can't use the ...