我想创建一个这样的表。
create table some_data (
id number(19,0),
group_id number(19,0),
value float,
timestamp timestamp
);
对于此表,我希望将数据存储为
group_id=1
jan-2015
feb-2015
...
group_id=2
jan-2015
feb-2015
...
等等。所以我假设我必须按group_id的范围创建分区,然后按时间戳列的范围创建子分区,对吗?
所以看起来应该是这样的:
create table some_data (
id number(19,0),
group_id number(19,0),
value float,
timestamp timestamp
)
PARTITION BY RANGE (group_id)
SUBPARTITION BY RANGE ("TIMESTAMP")
INTERVAL (NUMTOYMINTERVAL(1,'MONTH'))
(
PARTITION part_1 values LESS THAN (TO_DATE('01.02.2015','DD.MM.YYYY'))
);
这是对的吗?还有一个问题:使用这个分区,如果添加了一个新的group_id,oracle会自动为新的group_id创建一个新分区,为新数据创建新的分区吗?
答案 0 :(得分:1)
子分区级别不支持间隔分区:
http://docs.oracle.com/cd/E11882_01/server.112/e41084/statements_7002.htm#SQLRF54559
您可以这样定义:
create table some_data (
id number(19,0),
group_id number(19,0),
value float,
timestamp timestamp -- not good naming
)
PARTITION BY RANGE ("TIMESTAMP")
INTERVAL (NUMTOYMINTERVAL(1,'MONTH'))
SUBPARTITION BY RANGE (group_id) -- it could be hash or list as well
subpartition template(
...
)
(
PARTITION part_1 values LESS THAN (TO_DATE('01.02.2015','DD.MM.YYYY'))
);