（转）Oracle分区表 (Partition Table) 的创建及管理

Oracle分区表 (Partition Table) 的创建及管理

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一、创建分区表

分区表分为四类：1、范围分区表 2、列表分区表 3、哈希分区表 4、组合分区表

下面分别创建四类分区表。

1、范围分区表

CREATE TABLE range_example(
???? ?range_key_column DATE,
????? DATA VARCHAR2(20),
????? ID integer
) PARTITION BY RANGE(range_key_column)
(
? PARTITION part01 VALUES LESS THAN (TO_DATE('2008-07-1 00:00:00','yyyy-mm-dd hh24:mi:ss')) TABLESPACE tbs01,
??PARTITION part02 VALUES LESS THAN (TO_DATE('2008-08-1 00:00:00','yyyy-mm-dd hh24:mi:ss')) TABLESPACE tbs02,
? PARTITION part03 VALUES LESS THAN (TO_DATE('2008-09-1 00:00:00','yyyy-mm-dd hh24:mi:ss')) TABLESPACE tbs03
);

2、列表分区表

CREATE TABLE list_example(

????? dname VARCHAR2(10),

????? DATA VARCHAR2(20)

) PARTITION BY LIST(dname)

(????

? PARTITION part01 VALUES('ME','PE','QC','RD'),

? PARTITION part02 VALUES('SMT','SALE')

);

3、哈希分区表

CREATE TABLE hash_example(

????? hash_key_column DATE,

????? DATA VARCHAR2(20)

) PARTITION BY HASH(hash_key_cloumn)

(????

??PARTITION part01 ,

??PARTITION part02

);

4、组合分区表

CREATE TABLE range_hash_example(

????? range_column_key DATE,

????? hash_column_key INT,

???? ?DATA VARCHAR2(20)

)

PARTITION BY RANGE(range_column_key)

SUBPARTITION BY HASH(hash_column_key) SUBPARTITIONS 2

(

?? PARTITION part_1 VALUES LESS THAN (TO_DATE('2008-08-01','yyyy-mm-dd'))(

?

??????? SUBPARTITION part_1_sub_1,

??????? SUBPARTITION part_1_sub_2,

??????? SUBPARTITION part_1_sub_3

?? ),

?? PARTITION part_2 VALUES LESS THAN (TO_DATE('2008-09-01','yyyy-mm-dd'))(

??????? SUBPARTITION part_2_sub_1,

? ????? SUBPARTITION part_2_sub_2