当然也可以在create_materialized_view()之外定义索引，因为它只是创建Table的包装器。如果在表定义之外的...
物化视图最重要的作用就是对查询语句进行查询改写,如果期望查询语句能利用物化视图进行查询改写,则需要在查询语句前添加set odps.sql.materialized.view.enable.auto.rewriting=true;配置。当物化视图处于失效状态时无法用于查询改写,查询语句会直接查询源表而无法获得加速作用。 说明 默认每个MaxCompute项目只能利用自身的物化...
How to create Materialized view in SQL ServerRegards, tgvr"},"Conversation:conversation:3950639":{"__typename":"Conversation","id":"conversation:3950639","solved":false,"topic":{"__ref":"ForumTopicMessage:message:3950639"},"lastPostingActivityTime":"2023-10-10T22:05:31.133-07:00","las...
CREATE MATERIALIZED VIEW 项目 2025/01/30 4 个参与者 反馈 本文内容 语法 parameters 所需的权限 行筛选器和列掩码 显示另外 3 个 适用于:Databricks SQL 具体化视图是预计算结果可用于查询的视图,并且可以更新以反映输入中的更改。 每次刷新具体化视图时,都会重新计算查询结果,以反映上游数据集中的变化...
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...
CREATE MATERIALIZED VIEW Applies to:Databricks SQL Amaterialized viewis a view where precomputed results are available for query and can be updated to reflect changes in the input. Each time a materialized view is refreshed, query results are recalculated to reflect changes in upstream datasets. ...
CREATE MATERIALIZED VIEW table_name [ (column_name [, ...] ) ] [ WITH ( storage_parameter [= value] [, ... ] ) ] [ TABLESPACE tablespace_name ] AS query [ WITH [ NO ] DATA ] 描述 CREATE MATERIALIZED VIEW定义一个查询的物化视图。在命令发出时,该查询被执行并且用于填充视图(除非使用...
CREATE MATERIALIZED VIEW LOG CREATE MATERIALIZED ZONEMAP CREATE OPERATOR CREATE OUTLINE CREATE PACKAGE CREATE PACKAGE BODY CREATE PFILE CREATE PLUGGABLE DATABASE CREATE PROCEDURE CREATE PROFILE CREATE RESTORE POINT CREATE ROLE CREATE ROLLBACK SEGMENT CREATE SCHEMA 15 SQL Statements: CREATE SEQUENCE to DROP ...
Note: Not all SQL types support this. (e.g. can be done in Oracle and DBT, but not PostgreSQL.)To create a materialized view, add the MATERIALIZED keyword:CREATE MATERIALIZED VIEW myView AS [Query]; To refresh the view manually use the following command:REFRESH MATERIALIZED VIEW [view nam...
「図materialized_view_props.gif」の説明 (column_properties::=、table_partitioning_clauses::=(「CREATETABLE」構文の項)、parallel_clause::=、build_clause::=を参照) heap_org_table_clause::= 「図heap_org_table_clause.gif」の説明 (table_compression::=,inmemory_table_clause::=,ilm_clauseを参照...