数据仓库服务 GAUSSDB(DWS)-CREATE MATERIALIZED VIEW:示例

时间：2024-05-13 09:41:59

数据仓库服务 GAUSSDB(DWS) DDL语法

创建基表，并向基表插入数据：

  
       CREATE TABLE t1 (a int, b int) DISTRIBUTE BY HASH(a);
INSERT INTO t1 SELECT x,x FROM generate_series(1,10) x;

创建默认BUILD IMMEDIATE方式的物化视图：

  
       CREATE MATERIALIZED VIEW mv1 AS SELECT * FROM t1;

创建指定列存方式的物化视图：

  
       CREATE MATERIALIZED VIEW mv2 WITH(orientation = column) AS SELECT * FROM t1;

创建手动按需刷新的物化视图：

  
       CREATE MATERIALIZED VIEW mv3 BUILD DEFERRED REFRESH ON DEMAND AS SELECT * FROM t1;

创建指定刷新时间的物化视图：

  
       CREATE MATERIALIZED VIEW mv4 BUILD DEFERRED REFRESH START WITH(trunc(sysdate)) EVERY (interval ‘1 day’) AS SELECT * FROM t1;

数据仓库服务 GAUSSDB(DWS)-CREATE MATERIALIZED VIEW:示例

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