在Oracle 中创建 Materialized View 使用的是 CREATE MATERIALIZED VIEW 语句。下面是创建一个 Materialized View 的基本语法: CREATE MATERIALIZED VIEW view_name AS SELECT columns FROM table_name WHERE conditions; 举例来说,假设你想要创建一个名
Step 5: Write the CREATE OR REPLACE MATERIALIZED VIEW Statement Once you have determined the query and refresh method, you can write the CREATE OR REPLACE MATERIALIZED VIEW statement. The statement includes the name of the materialized view, the query to retrieve the data, and the refresh method...
创建Materialized View日志:要创建Materialized View日志,可以使用以下语法: CREATEMATERIALIZEDVIEWLOGONTABLESPACE<tablespace_name>WITHROWID, SEQUENCE,PRIMARYKEY, OBJECT_ID INCLUDINGNEWVALUES; AI代码助手复制代码 其中,是原始表的名称,<tablespace_name>是要存储Materialized View日志的表空间名称。可以选择包含ROWID、SEQUE...
语法如下: CREATE OR REPLACE VIEW view_name AS SELECT column1, column2, … FROM table_name WHERE condition; 使用CREATE MATERIALIZED VIEW语句:使用CREATE MATERIALIZED VIEW语句可以创建一个物化视图,物化视图是一种存储了查询结果的表。语法如下: CREATE MATERIALIZED VIEW view_name BUILD IMMEDIATE REFRESH COMP...
startwithto_date('15-12-2017 12:00:00','dd-mm-yyyy hh24:mi:ss')nexttrunc(sysdate+1)+1/24;--手动刷新物化视图execdbms_mview.refresh('VIEW_M_CARD')closedbms_refresh ;--创建存储过程来刷新物化视图CREATEORREPLACEPROCEDURESP_REFRESH_EMPLOYEEASBEGINDBMS_REFRESH.refresh('UCADM.VIEW_M_CARD')...
create materialized view vi_emp refresh force on demandasselectd.dname,e.ename,e.job,e.hiredatefromscott.dept d,scott.emp ewhered.deptno=e.deptno; 物化视图的刷新(refresh)的方法有四种:fast、complete、force和never,Oracle默认采用force方式,如上所示。
Oracle中的物化视图(Materialized View)是一种特殊的视图,它存储了查询结果的数据,而不是像普通视图那样仅存储查询的定义。物化视图允许用户对大型数据集进行预先计算和存储,从而提高了查询性能,尤其是在需要频繁访问相同数据集的情况下。 创建物化视图的基本语法 创建物化视图的基本语法如下: sql CREATE MATERIALIZED VIE...
CREATE MATERIALIZED VIEW LOG ON table WITH ROWID, SEQUENCE(id, name,STATUS) INCLUDING NEW VALUES; 然后创建物化视图 create materialized view mv_table1 on prebuild table --将物化视图建立在一个已经存在的表上 tablespace ts_data --保存表空间 ...
create materialized view[视图名称]build immediate|deferred refresh fase|complete|force on demand|commit startwith[start time]next[next time]withprimary key|rowid//可以省略,一般默认是主键物化视图as[要执行的SQL] ok,解释一下这些语法用意: build immediate | deferred (视图创建的方式): ...
一、物化视图的创建 create materialized view [view_name] refresh [fast|complete|force] [ on [commit|demand] | start with (start_time) next (next_time) ] as {创建物化视图用的查询语句} 具体实例如下: C…