Syntax 引數 備註 擁有權 顯示其他 4 個 適用於:Azure Synapse Analytics 此文章說明 Azure Synapse Analytics 中用於開發解決方案的 CREATE MATERIALIZED VIEW AS SELECT T-SQL 陳述式。 此文章也提供程式碼範例。 具體化檢視會保存從檢視定義查詢傳回的資料,並在底層資料表中的資料變更時自動取得更新。...
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, ...
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...
meaning that the command blocks until the refresh operation is complete. To refresh amaterialized view, use theREFRESH MATERIALIZED VIEWstatement. SeeREFRESH (MATERIALIZED VIEW or STREAMING TABLE)for details on the SQL syntax and parameters for this command. To learn more about the types ofmaterializ...
REFRESH(MATERIALIZED VIEW 或 STREAMING TABLE) 项目 2024/12/23 本文内容 语法 参数 示例 相关语句 适用于:Databricks SQL 刷新流式处理表或具体化视图的数据。 默认情况下,数据会同步刷新。 可以通过执行DESCRIBE EXTENDED来跟踪刷新状态。 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...
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...
, here is the sql statement (in postgresql syntax) we use to create a view that summarizes user purchases: sql create view user_purchase_summary as select u . id as user_id , count ( * ) as total_purchases , sum ( purchases . amount ) as lifetime_value from users u join purchases...
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...
Learn how to use the CREATE MATERIALIZED VIEW syntax of the SQL language in Databricks SQL and Databricks Runtime.
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; Optionally, if you'd like to refresh it concurrently (and avoid locks), and if your view...