浅谈Oracle中的物化视图

CREATE MATERIALIZED VIEW LOG ON mv_lvy_levytaxbgtdiv
tablespace ZGMV_DATA --日志保存在特定的表空间
WITH ROWID ;
CREATE MATERIALIZED VIEW LOG ON tb_lvy_levydetaildata
tablespace ZGMV_DATA --日志保存在特定的表空间
WITH ROWID,sequence(LEVYDETAILDATAID);
CREATE MATERIALIZED VIEW LOG ON tb_lvy_levydata
tablespace ZGMV_DATA --日志保存在特定的表空间
WITH rowid,sequence(LEVYDATAID);
然后创建物化视图
--创建物化视图
create materialized view MV_LVY_LEVYDETAILDATA
TABLESPACE ZGMV_DATA --保存表空间
BUILD DEFERRED --延迟刷新不立即刷新
refresh force --如果可以快速刷新则进行快速刷新，否则完全刷新
on demand --按照指定方式刷新
start with to_date('24-11-2005 18:00:10', 'dd-mm-yyyy hh24:mi:ss') --***次刷新时间
next TRUNC(SYSDATE+1)+18/24 --刷新时间间隔
as
SELECT levydetaildataid, detaildatano, taxtermbegin, taxtermend,
......
ROUND(taxdeduct * taxpercent1, 2) - ROUND(taxdeduct * taxpercent2, 2) -
ROUND(taxdeduct * taxpercent3, 2) - ROUND(taxdeduct * taxpercent4, 2) -
ROUND(taxdeduct * taxpercent5, 2) taxdeduct, ROUND(taxfinal * taxpercent1, 2) -
ROUND(taxfinal * taxpercent2, 2) - ROUND(taxfinal * taxpercent3, 2) -
ROUND(taxfinal * taxpercent4, 2) - ROUND(taxfinal * taxpercent5, 2) taxfinal,
a.levydataid, a.budgetitemcode, taxtypecode,
......
FROM tb_lvy_levydetaildata a, tb_lvy_levydata c, MV_LVY_LEVYTAXBGTDIV b
WHERE a.levydataid = c.levydataid
AND a.budgetdistrscalecode = b.budgetdistrscalecode
AND a.budgetitemcode = b.budgetitemcode
AND c.incomeresidecode = b.rcvfisccode
AND C.TAXSTATUSCODE='08'
AND C.NEGATIVEFLAG!='9'
删除物化视图日志
--删除物化视图：
--删除日志： DROP materialized view log on mv_lvy_levytaxbgtdiv;
DROP materialized view log on tb_lvy_levydetaildata;
DROP materialized view log on tb_lvy_levydata;
--删除物化视图 drop materialized view MV_LVY_LEVYDETAILDATA;
--基本和对表的操作一致 --物化视图由于是物理真实存在的，故可以创建索引。
创建方式和对普通表创建方式相同，就不在重复写了。

create materialized view lgc
     build immediate
     refresh on commit
     enable query rewrite
as

ALTER MATERIALIZED VIEW user_order_mavi
   DISABLE QUERY REWRITE
   REFRESH ON DEMAND;