SQL> EXEC DBMS_MVIEW.REFRESH('mv_emp_rowid','C'); PL/SQL procedure successfully completed 1. 2. 3. 批量完全刷新 begin for rec in (select mview_name mview_name from user_mviews) loop DBMS_MVIEW.REFRESH(rec.mview_name,'C'); end loop; end; 1. 2. 3. 4. 5. 6. 使用dbms_r...
15:38:12TOM@ test1 >exec dbms_mview.refresh('mv1_emp1','fast'); PL/SQL procedure successfully completed. 15:38:
But before, let's have look into the basics of views and materialized view individually for better understanding of the differences between them. Views in SQL Views are the logical and virtual copy of a table that is created by executing a "SELECT query" statement. The views are not stored...
检查任务及 MView 的状态无误之后可以通过以下 PL/SQL 创建定时增量刷新任务,以实现每 30 分钟同步一次数据。 BEGIN DBMS_SCHEDULER.CREATE_JOB ( JOB_NAME => 'MV_REFRESH_USR2_UPI_RESULT', JOB_TYPE => 'PLSQL_BLOCK', JOB_ACTION => Q'[BEGIN DBMS_MVIEW.REFRESH(LIST=>'USR2.UPI...
通过案例学调优之--跨库建立物化视图(Materialized View) 应用环境: 操作系统: RedHat EL55 Oracle: Oracle 10gR2 一、物化视图概述 在复制环境下,创建的物化视图通常情况下主键,rowid和子查询视图。 物化视图由于是物理真实存在的,故可以创建索引。 二、物化视图刷新 ...
DBMS_STATSパッケージの詳細は、『Oracle Database PL/SQLパッケージおよびタイプ・リファレンス』を参照してください。 クエリー・リライトに関する問題の診断については、DBMS_MVIEWパッケージのEXPLAIN_MVIEWプロシージャを参照してください。クエリー・リライトの問題の修正については、...
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 BY c.cust_id / SQL> / Materialized view created. ...
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 ...
SQL> CREATE MATERIALIZED VIEW LOG ON emp;Materialized view log created. 对于增量刷新选项,如果在子查询中存在分析函数,则实例化视图不起作用。 Refresh方法- COMPLETE子句 完全刷新重新生成整个视图,如果请求完全刷新,oracle会完成 完全刷新即使增量刷新可用。
When to Use View vs Materialized View in SQL Mostly in application we use views because they are more feasible, only logical representation of table data no extra space needed. We easily get replica of data and we can perform our operation on that data without affecting actual table data but...