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为 mv_sales 的物化视图,用于存储销售数据的汇总信息: CREATE MATERI...
SQL> create materialized view mv_name refresh force on demand start with sysdate next sysdate+1; 上述创建的物化视图每天刷新,但是没有指定刷新时间,如果要指定刷新时间(比如每天晚上10:00定时刷新一次): SQL> create materialized view mv_name refresh force on demand start with sysdate next to_date( con...
SQL>create materialized view mv_t2build immediate3refresh fast4on demand5startwithsysdate6next sysdate+27asselect*from sys_user;asselect*from sys_user;第7行出现错误:ORA-12014:表'SYS_USER'不包含主键约束条件 这是因为as SQL语句的表没创建主键,而是使用的是基于表的物化视图,解决方法是新建主键 (2)...
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...
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...
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。
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 ...
oracle-物化视图-MATERIALIZED VIEW 物化视图学习 简介: ---建测试表 createtableuserA.test20210730asselect*fromuserA.saleswhererownum<10000000; ---创建物化视图日志 CREATEMATERIALIZEDVIEWLOGONtest20210730WITHROWID,SEQUENCE(STORE_CODE, PRODUCT_SKU_CODE, SECOND...
2@@@create a materialized view for that sql statement sql> conn sh/sh sql> ed CREATE MATERIALIZED VIEW cust_sales_mv ENABLE QUERY REWRITE AS SELECT c.cust_id , SUM(amount_sold) AS amount FROM sales s, customers c WHERE s.cust_id=c.cust_id GROUP...
CREATE MATERIALIZED VIEW LOG ON tableName; 1. 主键(PrimaryKey)物化视图 PRIMARY KEY是默认选项 在远程数据库表acct_price_Plan上创建主键物化视图 -- Create database link create database link PROD_DB_LINK connect to CC using '(DESCRIPTION = ...