Oracle 11g 虚拟列子分区实验

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。

droptabletest_partpurge;

createtabletest_part
(t_timedate,hournumber,city_idnumber,hour_cityvarchar2(108)GENERATEDALWAYSAS(to_char(hour)||'|'||to_char(city_id)))
partitionbyrange(t_time)subpartitionbyhash(hour_city)
(partitionpart_201705valueslessthan(to_date('20170601','yyyymmdd'))
(subpartitionsubpart_201705_01,subpartitionsubpart_201705_02),partitionpart_201706valueslessthan(to_date('20170701','yyyymmdd'))
(subpartitionsubpart_201706_01,subpartitionsubpart_201706_02))

createtabletest_part
(t_timedate,hournumber(2),day_hourvarchar2(50)GENERATEDALWAYSAS(to_char(t_time,'yyyymmdd')||'|'||to_char(hour)))
partitionbyrange(day_hour)subpartitionbyhash(city_id)
(partitionpart_201705valueslessthan('2017060100')
(subpartitionsubpart_201705_01,partitionpart_201706valueslessthan('2017070100')
(subpartitionsubpart_201706_01,subpartitionsubpart_201706_02))