符合中小企业对网站设计、功能常规化式的企业展示型网站建设
本套餐主要针对企业品牌型网站、中高端设计、前端互动体验...
商城网站建设因基本功能的需求不同费用上面也有很大的差别...
手机微信网站开发、微信官网、微信商城网站...
Oracle 11g 虚拟列子分区实验
创新互联建站坚持“要么做到,要么别承诺”的工作理念,服务领域包括:网站制作、网站建设、企业官网、英文网站、手机端网站、网站推广等服务,满足客户于互联网时代的龙湖网站设计、移动媒体设计的需求,帮助企业找到有效的互联网解决方案。努力成为您成熟可靠的网络建设合作伙伴!
以下两个create 语句均为创建成功;
需求描述:
项目要求对3个字段进行分区,如时间,小时,还有个区域ID,便联想到虚拟列。
drop table test_part purge; create table test_part (t_time date, hour number, city_id number, hour_city varchar2(108) GENERATED ALWAYS AS(to_char(hour)||'|'||to_char(city_id))) partition by range(t_time) subpartition byhash(hour_city) (partition part_201705 values less than(to_date('20170601', 'yyyymmdd')) (subpartition subpart_201705_01, subpartition subpart_201705_02), partition part_201706 values less than (to_date('20170701', 'yyyymmdd')) (subpartition subpart_201706_01, subpartition subpart_201706_02)) create table test_part (t_time date, hour number(2), city_id number, day_hour varchar2(50) GENERATED ALWAYS AS (to_char(t_time,'yyyymmdd')||'|'||to_char(hour))) partition by range(day_hour) subpartition byhash(city_id) (partition part_201705 values less than('2017060100') (subpartition subpart_201705_01, subpartition subpart_201705_02), partition part_201706 values less than ('2017070100') (subpartition subpart_201706_01, subpartition subpart_201706_02))