Oracle物化视图。
1、创建物化视图：
create materialized view MV_YHMYDBB PARALLEL 10
refresh force on demand
start with sysdate next trunc(sysdate) + 1 + 5/1440
as
select ……
2、手动刷新物化视图：
alter materialized view MV_YHMYDBB refresh force;
3、修改物化视图下次刷新时间：
alter materialized view MV_XZQYSCTJ
refresh force on demand
next null
4、实表更新：
truncate table mv_sv_dispatch;
insert /*+append*/ into mv_sv_dispatch
select /*+parallel(sd 10)*/ SD.REQUEST_ID,
inform_org_id,
MIN(SD.Dispatch_Date) Dispatch_Date
from SV_DISPATCH SD
WHERE SD.DELETED_FLAG = ‘0’
and SD.Inform_Org_Type = ‘SS’
GROUP BY SD.REQUEST_ID, sd.inform_org_id;
commit;
5、建物化视图索引：
create index idx_MV_XZQYSCTJ_1 on MV_XZQYSCTJ(RECEIPT_DATE)