Oracle分区表创建

一、分区表的创建

1、创建范围分区

create table range_part_tab (id number,deal_date date,area_code number,nbr number,contents varchar2(4000))
partition by range (deal_date)
(
partition p_201301 values less than (TO_DATE('2013-02-01', 'YYYY-MM-DD')),
partition p_201302 values less than (TO_DATE('2013-03-01', 'YYYY-MM-DD')),
partition p_201303 values less than (TO_DATE('2013-04-01', 'YYYY-MM-DD')),
partition p_201304 values less than (TO_DATE('2013-05-01', 'YYYY-MM-DD')),
partition p_201305 values less than (TO_DATE('2013-06-01', 'YYYY-MM-DD')),
partition p_201306 values less than (TO_DATE('2013-07-01', 'YYYY-MM-DD')),
partition p_201307 values less than (TO_DATE('2013-08-01', 'YYYY-MM-DD')),
partition p_201308 values less than (TO_DATE('2013-09-01', 'YYYY-MM-DD')),
partition p_201309 values less than (TO_DATE('2013-10-01', 'YYYY-MM-DD')),
partition p_201310 values less than (TO_DATE('2013-11-01', 'YYYY-MM-DD')),
partition p_201311 values less than (TO_DATE('2013-12-01', 'YYYY-MM-DD')),
partition p_201312 values less than (TO_DATE('2014-01-01', 'YYYY-MM-DD')),
partition p_201401 values less than (TO_DATE('2014-02-01', 'YYYY-MM-DD')),
partition p_201402 values less than (TO_DATE('2014-03-01', 'YYYY-MM-DD')),
partition p_max values less than (maxvalue)
)
;

2、创建列表分区

create table list_part_tab (id number,deal_date date,area_code number,nbr number,contents varchar2(4000))
partition by list (area_code)
(
partition p_591 values  (591),
partition p_592 values  (592),
partition p_593 values  (593),
partition p_594 values  (594),
partition p_595 values  (595),
partition p_596 values  (596),
partition p_597 values  (597),
partition p_598 values  (598),
partition p_599 values  (599),
partition p_other values  (DEFAULT)
)
;

3、创建HASH分区

create table hash_part_tab (id number,deal_date date,area_code number,nbr number,contents varchar2(4000))
partition by hash (deal_date)
PARTITIONS 12
;```

4、联合字段范围分区

create table range_part_mult_col_tab (id number,deal_date date,area_code number,nbr number,contents varchar2(4000))

partition by range (area_code,deal_date)

(

partition p_591_201312 values less than (591,TO_DATE(‘2014-01-01’, ‘YYYY-MM-DD’)),

partition p_591_201401 values less than (591,TO_DATE(‘2014-02-01’, ‘YYYY-MM-DD’)),

partition p_591_201402 values less than (591,TO_DATE(‘2014-03-01’, ‘YYYY-MM-DD’)),

partition p_591_max values less than (591,maxvalue),

partition p_592_201312 values less than (592,TO_DATE(‘2014-01-01’, ‘YYYY-MM-DD’)),

partition p_592_201401 values less than (592,TO_DATE(‘2014-02-01’, ‘YYYY-MM-DD’)),

partition p_592_201402 values less than (592,TO_DATE(‘2014-03-01’, ‘YYYY-MM-DD’)),

partition p_592_max values less than (592,maxvalue),

partition p_593_201401 values less than (593,TO_DATE(‘2014-02-01’, ‘YYYY-MM-DD’)),

partition p_593_201402 values less than (593,TO_DATE(‘2014-03-01’, ‘YYYY-MM-DD’)),

partition p_593_max values less than (593,maxvalue)

)

;

“`

二、注意事项

1、分区表默认不允许跨分区移到的，如果更新表导致记录会跨分区移到，将会报如下的错误

ORA-14402: 更新分区关键字列将导致分区的更改

避免该错误，执行：

alter table part_tab_rowid enable row movement;

2、记录跨分区移到后，rowid将会改变

3、只查询某一个分区数据

select * from 表名 partition(分区名)